Java实现FIFO、LRU、LFU、OPT页面置换算法

题目要求

采用多道程序思想设计一个程序，模拟页存储管理地址变换的过程，可采用FIFO、LRU、LFU、OPT四页面置换算法。基本要求如下：

需要建立访问页表线程、访问快表线程、缺页中断处理线程、访问内存线程等，协同这些线程模拟完成地址变换的过程。
输入一个逻辑页面访问序列和随机产生逻辑页面访问序列，分别由四个算法完成页面置换；
能够设定驻留内存页面的个数、内存的存取时间、缺页中断的时间、快表的时间，并提供合理省缺值，可以暂停和继续系统的执行；
能够设定页号序列中逻辑页面个数和范围；
能够设定有快表和没有快表的运行模式；
提供良好图形界面，同时能够展示四个算法运行的结果；
给出每种页面置换算法每个页面的存取时间；
能够将每次的实验输入和实验结果存储起来，随时可查询；
完成多次不同设置的实验，总结实验数据，看看能得出什么结论。

github地址

运行界面

执行界面

保存界面

历史界面

具体代码

四种页面置换算法具体实现

config

 
package com.lr.algurithm;
 
public class config {
 
   public static int page_low =;
   public static int page_high =;
   public static int page_list_low =;
   public static int page_list_high =;
 
   public static int run_time =;
 
   public static int quick_table_num =;//快表大小
   public static int memory_num =;//内存块数
   public static double memory_access =;//内存存取时间
   public static double quick_table_access =;//快表存取时间
   public static double miss_page_interrupt =;//缺页中断处理时间
   public static int taskSize =;//页面序列数量
   public static int[] task = new int[taskSize];//页面序列存放
   public static boolean is_check=false;//快表启用判断
 
}

FIFO算法

FIFO

 
package com.lr.algurithm;
 
import com.lr.frame.Page;
import sun.awt.Mutex;
 
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.ArrayList;
import java.util.List;
 
public class FIFO extends Thread{
 
   private int fifo_i =;
   public int fifo_lackpage=;//缺页数
   public double fifo_ave_time=;//平均时间
   public double fifo_total_time=;//总时间
   public List<Integer> fifo_memory_page = new ArrayList<>();//内存现有页数存放
   public List<Integer> fifo_quick_table_page = new ArrayList<>();//快表现有页数存放
   public Mutex pause = new Mutex();
   public String snumber = new String();
   public String interruption = new String();
   public String totalTime = new String();
   public String avrTime = new String();
   public String missPage = new String();
 
   public double start(int a, double per_time) {
      if (!config.is_check) { //无快表模式
         if (!fifo_memory_page.contains(a)) { //不在内存，产生缺页中断
            fifo_lackpage ++ ;
            if (fifo_memory_page.size() < config.memory_num)
               fifo_memory_page.add(a);
            else {
               fifo_memory_page.remove();
               fifo_memory_page.add(a);
            }
            fifo_total_time += * config.memory_access + config.miss_page_interrupt;
            per_time += * config.memory_access + config.miss_page_interrupt;
         } else {
            fifo_total_time += * config.memory_access;
            per_time += * config.memory_access;
         }
      }
      else { //快表模式
         if (!fifo_quick_table_page.contains(a)) { //不在快表
            if (!fifo_memory_page.contains(a)) { //不在内存，产生缺页中断
               fifo_lackpage ++ ;
               if (fifo_memory_page.size() < config.memory_num) //内存块未满,直接调入
                  fifo_memory_page.add(a);
               else {
                  fifo_memory_page.remove();
                  fifo_memory_page.add(a);
               }
 
               //快表置换用FIFO
               if (fifo_quick_table_page.size() < config.quick_table_num)
                  fifo_quick_table_page.add(a);
               else {
                  fifo_quick_table_page.remove();
                  fifo_quick_table_page.add(a);
               }
               fifo_total_time += * config.memory_access + config.miss_page_interrupt;
               per_time += * config.memory_access + config.miss_page_interrupt;
            } else { //在内存
               fifo_total_time += * config.memory_access;
               per_time += * config.memory_access;
            }
         }  else { //在快表
            fifo_total_time += config.quick_table_access + config.memory_access;
            per_time += config.quick_table_access + config.memory_access;;
         }
      }
      return per_time;
   }
 
   @Override
   public void run() {
      super.run();
      for(fifo_i =; fifo_i < config.taskSize; fifo_i ++ ) {
         pause.lock();
 
         double per_time =;
         per_time = start(config.task[fifo_i], per_time);
         String str="查找";
         String s = String.valueOf(config.task[fifo_i]);
         snumber += str;
         snumber += s;
         snumber += ":";
 
         for (int j =; j < config.memory_num; j ++ ) {
            if (j < fifo_memory_page.size()) {
               String s = String.valueOf(fifo_memory_page.get(j));
               snumber += s;
               snumber += " ";
            }
            else {
               snumber += " ";
            }
         }
         pause.unlock();
         BigDecimal bd = new BigDecimal(per_time);
         bd = bd.setScale(, RoundingMode.HALF_UP);
         snumber += "耗费时间:" + bd + "\n";
         Page.FIFOtest.append(snumber);
         snumber = "";
         try {
            sleep(config.run_time);//睡眠ms
         } catch (InterruptedException e) {
            e.printStackTrace();
         }
      }
      String s = String.valueOf(config.taskSize);
      s = String.valueOf(fifo_lackpage);
      interruption = s + "次";
 
      // emit fifo_updata(s+"次","interrupt_label");
      double d = (double)fifo_lackpage / config.taskSize *;
      BigDecimal bd = new BigDecimal(d);
      bd = bd.setScale(, RoundingMode.HALF_UP);
      totalTime = String.valueOf(fifo_total_time);
      fifo_ave_time = fifo_total_time / config.taskSize;
      BigDecimal bda = new BigDecimal(fifo_ave_time);
      bda = bda.setScale(, RoundingMode.HALF_UP);
      avrTime = String.valueOf(bda);
      missPage = bd + "%";
      Page.fifo_interrupt_label.setText(interruption);
      Page.fifo_total_time_label.setText(totalTime);
      Page.fifo_ave_time_label.setText(avrTime);
      Page.fifo_miss_page_label.setText(missPage);
      // System.out.println("fifo:"+s);
      // System.out.println("fifo:"+fifo_total_time);
      // System.out.println("fifo:"+fifo_ave_time);
      // System.out.println("fifo:"+d + "%");
 
   }
}

LRU算法

LRU

 
package com.lr.algurithm;
 
import com.lr.frame.Page;
import sun.awt.Mutex;
 
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.ArrayList;
import java.util.List;
 
public class LRU extends Thread {
 
   private int lru_i =;
   public int lru_lackpage=;//缺页数
   public double lru_ave_time=;//平均时间
   public double lru_total_time=;//总时间
   public List<Integer> lru_memory_page = new ArrayList<>();//内存现有页数存放
   public List<Integer> lru_quick_table_page = new ArrayList<>();//快表现有页数存放
   public Mutex pause = new Mutex();
   public String snumber = new String();
   public String interruption = new String();
   public String totalTime = new String();
   public String avrTime = new String();
   public String missPage = new String();
 
   public double start(int a, double per_time) {
      if(!config.is_check) { //无快表模式
 
         if(!lru_memory_page.contains(a)) { //不在内存，产生缺页中断
            lru_lackpage ++ ;
            if(lru_memory_page.size() < config.memory_num) {
               lru_memory_page.add(a);
            } else {
               lru_memory_page.remove();
               lru_memory_page.add(a);
            }
            lru_total_time += * config.memory_access + config.miss_page_interrupt;
            per_time += * config.memory_access + config.miss_page_interrupt;
         }
         else { //在内存中则找出这个元素并删除，在末尾添加这个元素，保证最近访问的置于末尾
            // if (a < lru_memory_page.size())
            int temp =;
            for (int i =; i < lru_memory_page.size(); ++ i) {
               if (a == lru_memory_page.get(i))
                  temp = i;
            }
            lru_memory_page.remove(temp);
            // System.out.println(a);
            lru_memory_page.add(a);
            lru_total_time += * config.memory_access;
            per_time += * config.memory_access;
         }
      }
      else { //快表模式
         if(!lru_quick_table_page.contains(a)) { //不在快表
            if(!lru_memory_page.contains(a)) { //不在内存，产生缺页中断
               lru_lackpage ++ ;
               if(lru_memory_page.size() < config.memory_num) { //内存块未满,直接调入
                  lru_memory_page.add(a);
               } else {
                  lru_memory_page.remove();
                  lru_memory_page.add(a);
               }
               //快表置换用FIFO
               if(lru_quick_table_page.size() < config.quick_table_num) {
                  lru_quick_table_page.add(a);
               } else {
                  lru_quick_table_page.remove();
                  lru_quick_table_page.add(a);
               }
               lru_total_time += * config.memory_access + config.miss_page_interrupt;
               per_time += * config.memory_access + config.miss_page_interrupt;
            }
            else { //在内存
               int temp =;
               for (int i =; i < lru_memory_page.size(); ++ i) {
                  if (a == lru_memory_page.get(i))
                     temp = i;
               }
               lru_memory_page.remove(temp);
               lru_memory_page.add(a);
               lru_total_time += * config.memory_access;
               per_time += * config.memory_access;
            }
         } else { //在快表
            int temp =;
            for (int i =; i < lru_memory_page.size(); ++ i) {
               if (a == lru_memory_page.get(i))
                  temp = i;
            }
            lru_memory_page.remove(temp);
            lru_memory_page.add(a);
            lru_total_time += config.quick_table_access + config.memory_access;
            per_time += config.quick_table_access + config.memory_access;
         }
      }
      return per_time;
   }
 
   @Override
   public void run() {
      for (lru_i =; lru_i < config.taskSize; lru_i ++ ) {
         pause.lock();
 
         double per_time =;
         per_time = start(config.task[lru_i],per_time);
         String str="查找";
         String s = String.valueOf(config.task[lru_i]);
         snumber += str;
         snumber += s;
         snumber += ":";
 
         for (int j =; j < config.memory_num; j ++ ) {
            if (j < lru_memory_page.size()) {
               String s = String.valueOf(lru_memory_page.get(j));
               snumber+=s;
               snumber+=" ";
            } else {
               snumber+=" ";
            }
         }
         pause.unlock();
         BigDecimal bd = new BigDecimal(per_time);
         bd = bd.setScale(, RoundingMode.HALF_UP);
         snumber += "耗费时间:" + bd.toString() + "\n";
         Page.LRUtest.append(snumber);
         snumber = "";
         try {
            sleep(config.run_time);
         } catch (InterruptedException e) {
            e.printStackTrace();
         }
      }
      String s = String.valueOf(config.taskSize);
      s = String.valueOf(lru_lackpage);
      interruption = s + "次";
      double d = (double)lru_lackpage / config.taskSize *;
      BigDecimal bd = new BigDecimal(d);
      bd = bd.setScale(, RoundingMode.HALF_UP);
      lru_ave_time = (double)lru_total_time / config.taskSize;
      totalTime = String.valueOf(lru_total_time);
      BigDecimal bda = new BigDecimal(lru_ave_time);
      bda = bda.setScale(, RoundingMode.HALF_UP);
      avrTime = String.valueOf(bda);
      missPage = bd + "%";
      Page.lru_interrupt_label.setText(interruption);
      Page.lru_total_time_label.setText(totalTime);
      Page.lru_ave_time_label.setText(avrTime);
      Page.lru_miss_page_label.setText(missPage);
      // System.out.println("lru"+s);
      // System.out.println("lru"+lru_total_time);
      // System.out.println("lru"+lru_ave_time);
      // System.out.println("lru"+d + "%");
   }
}

LFU算法

LFU

 
package com.lr.algurithm;
 
import com.lr.frame.Page;
import com.lr.tool.Node;
import sun.awt.Mutex;
 
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.ArrayList;
import java.util.List;
 
public class LFU extends Thread {
 
   private int lfu_i =;
   public int lfu_lackpage=;//缺页数
   public double lfu_ave_time=;//平均时间
   public double lfu_total_time=;//总时间
   public List<Node> lfu_memory_page = new ArrayList<>();//内存现有页数存放
   public List<Integer> lfu_quick_table_page = new ArrayList<>();//快表现有页数存放
   public Mutex pause = new Mutex();
   public String snumber = new String();
   public String interruption = new String();
   public String totalTime = new String();
   public String avrTime = new String();
   public String missPage = new String();
 
   public double start(int a, double per_time) {
      if(!config.is_check) { //无快表模式
         boolean flag = true;
         int index =;
         for (Node map:lfu_memory_page) {
            if(map.key == a) {
               flag = false;
               break;
            }
            index ++ ;
         }
 
         if (flag) { //不在内存
            lfu_lackpage ++ ;
            //内存满，删去访问频率最小的那个，相等的频率按fifo删除
            if(lfu_memory_page.size() >= config.memory_num) {
               Node min_obj;
               min_obj = lfu_memory_page.get();
               for (Node pair : lfu_memory_page) {
                  if (pair.value < min_obj.value) {
                     min_obj = pair;
                  }
               }
               lfu_memory_page.remove(min_obj);
            }
            lfu_memory_page.add(new Node(a));
            lfu_total_time += * config.memory_access + config.miss_page_interrupt;
            per_time += * config.memory_access + config.miss_page_interrupt;
         } else {
 
            lfu_memory_page.get(index).value++;
            lfu_total_time += * config.memory_access;
            per_time += * config.memory_access;
         }
      } else { //快表模式
         if(!lfu_quick_table_page.contains(a))//不在快表
         {
            boolean flag = true;
            int index =;
            for (Node map : lfu_memory_page) {
               if (map.key == a) {
                  flag = false;
                  break;
               }
               index ++ ;
            }
 
            if (flag) { //不在内存
               lfu_lackpage ++ ;
               //内存满，删去访问频率最小的那个，相等的频率按lfu删除
               if (lfu_memory_page.size() >= config.memory_num) {
                  Node min_obj;
                  min_obj = lfu_memory_page.get();
                  for (Node map : lfu_memory_page) {
                     if(map.value < min_obj.value) {
                        min_obj = map;
                     }
                  }
                  lfu_memory_page.remove(min_obj);
               }
 
               lfu_memory_page.add(new Node(a));
 
               //快表置换用FIFO
               if (lfu_quick_table_page.size() < config.quick_table_num) {
                  lfu_quick_table_page.add(a);
               } else {
                  lfu_quick_table_page.remove();
                  lfu_quick_table_page.add(a);
               }
 
               lfu_total_time += * config.memory_access + config.miss_page_interrupt;
               per_time += * config.memory_access + config.miss_page_interrupt;
            } else { //在内存
               lfu_memory_page.get(index).value++;
 
               lfu_total_time += * config.memory_access;
               per_time += * config.memory_access;
            }
         } else { //在快表
            int index =;
            for (Node map : lfu_memory_page) {
               if(map.key == a) {
                  lfu_memory_page.get(index).value++;
                  break;
               }
               index++;
            }
            lfu_total_time += config.quick_table_access + config.memory_access;
            per_time += config.quick_table_access + config.memory_access;
         }
      }
      return per_time;
   }
 
   @Override
   public void run() {
      for(lfu_i =; lfu_i < config.taskSize; lfu_i ++ ) {
         pause.lock();
         double per_time =;
         per_time = start(config.task[lfu_i], per_time);
         String str = "查找";
         String s = String.valueOf(config.task[lfu_i]);
         snumber += str;
         snumber += s;
         snumber += ":";
 
         for (int j =; j < config.memory_num; j ++) {
            if (j < lfu_memory_page.size()) {
               String s = String.valueOf(lfu_memory_page.get(j).key);
               snumber+=s;
               snumber+=" ";
            } else {
               snumber+=" ";
            }
         }
         pause.unlock();
         BigDecimal bd = new BigDecimal(per_time);
         bd = bd.setScale(, RoundingMode.HALF_UP);
         snumber += "耗费时间:" + bd + "\n";
         Page.LFUtest.append(snumber);
         snumber = "";
         try {
            sleep(config.run_time);
         } catch (InterruptedException e) {
            e.printStackTrace();
         }
      }
      String s = String.valueOf(config.taskSize);
      s = String.valueOf(lfu_lackpage);
      interruption = s + "次";
      double d = (double)lfu_lackpage / config.taskSize *;
      BigDecimal bd = new BigDecimal(d);
      bd = bd.setScale(, RoundingMode.HALF_UP);
      lfu_ave_time = (double)lfu_total_time / config.taskSize;
      totalTime = String.valueOf(lfu_total_time);
      BigDecimal bda = new BigDecimal(lfu_ave_time);
      bda = bda.setScale(, RoundingMode.HALF_UP);
      avrTime = String.valueOf(bda);
      missPage = bd + "%";
      Page.lfu_interrupt_label.setText(interruption);
      Page.lfu_total_time_label.setText(totalTime);
      Page.lfu_ave_time_label.setText(avrTime);
      Page.lfu_miss_page_label.setText(missPage);
      // System.out.println("lfu"+s);
      // System.out.println("lfu"+lfu_total_time);
      // System.out.println("lfu"+lfu_ave_time);
      // System.out.println("lfu"+d + "%");
   }
}

Node

 
package com.lr.tool;
 
public class Node {
   public int key;
   public int value;
   public Node() {
      key =;
      value =;
   }
   public Node(int Key) {
      key = Key;
      value =;
   }
 
   public Node(int a, int i) {
   }
}

OPT算法

OPT

 
package com.lr.algurithm;
 
import com.lr.frame.Page;
import sun.awt.Mutex;
 
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
public class OPT extends Thread {
 
   private int opt_i =;
   public int opt_lackpage=;//缺页数
   public double opt_ave_time=;//平均时间
   public double opt_total_time=;//总时间
   public List<Integer> opt_memory_page = new ArrayList<>();//内存现有页数存放
   // public int[] opt_memory_page = new int[config.taskSize];
   public List<Integer> opt_quick_table_page = new ArrayList<>();//快表现有页数存放
   public Mutex pause = new Mutex();
   public String snumber = new String();
   public String interruption = new String();
   public String totalTime = new String();
   public String avrTime = new String();
   public String missPage = new String();
 
   public double start(int a, double per_time) {
      if (!config.is_check) { //无快表模式
         if (!opt_memory_page.contains(a)) { //不在内存，产生缺页中断
            opt_lackpage ++ ;
            if (opt_memory_page.size() < config.memory_num) {
               opt_memory_page.add(a);
            } else { //遍历之后所有页号，与内存内页号相同则移到尾部，最后删除头部
               Map<Integer, Boolean> has_move = new HashMap<>();//移动过的不能再移动
               int cnt =;//移动次数要小于内存块数
               for (int j =; j < config.taskSize; j ++ ) {
                  has_move.put(config.task[j], false);
               }
 
               for (int j = opt_i +; j < config.taskSize; j ++ ) { //从需要进入内存的页号的后一位开始
                  if(opt_memory_page.contains(config.task[j])
                        && has_move.get(config.task[j]) != true
                        && cnt < config.memory_num -)
                  {
                     int temp =;
                     for (int i =; i < opt_memory_page.size(); ++ i) {
                        if (config.task[j] == opt_memory_page.get(i))
                           temp = i;
                     }
                     opt_memory_page.remove(temp);
                     opt_memory_page.add(config.task[j]);
                     has_move.put(config.task[j], true);
                     cnt ++ ;
                  }
               }
               opt_memory_page.remove();
               opt_memory_page.add(a);
 
            }
            opt_total_time += * config.memory_access + config.miss_page_interrupt;
            per_time += * config.memory_access + config.miss_page_interrupt;
         } else {
            opt_total_time += * config.memory_access;
            per_time += * config.memory_access;
         }
      } else { //快表模式
         if(!opt_quick_table_page.contains(a)) { //不在快表
            if(!opt_memory_page.contains(a)) { //不在内存，产生缺页中断
               opt_lackpage ++ ;
               if(opt_memory_page.size() < config.memory_num) { //内存块未满,直接调入
                  opt_memory_page.add(a);
               } else {
                  Map<Integer, Boolean> has_move = new HashMap<>();//移动过的不能再移动
                  int cnt =;//移动次数要小于内存块数
                  for (int j =; j < config.taskSize; j ++ ) {
                     has_move.put(config.task[j], false);
                  }
                  for(int j = opt_i +; j < config.taskSize; j ++ ) { //从需要进入内存的页号的后一位开始
                     if(opt_memory_page.contains(config.task[j])
                           && has_move.get(config.task[j]) != true
                           && cnt < config.memory_num -) {
                        int temp =;
                        for (int i =; i < opt_memory_page.size(); ++ i) {
                           if (config.task[j] == opt_memory_page.get(i))
                              temp = i;
                        }
                        opt_memory_page.remove(temp);
                        opt_memory_page.add(config.task[j]);
                        has_move.put(config.task[j], true);
                        cnt++;
                     }
                  }
                  opt_memory_page.remove();
                  opt_memory_page.add(a);
               }
 
               //快表置换用FIFO
               if(opt_quick_table_page.size() < config.quick_table_num) {
                  opt_quick_table_page.add(a);
               } else {
                  opt_quick_table_page.remove();
                  opt_quick_table_page.add(a);
               }
               opt_total_time += * config.memory_access + config.miss_page_interrupt;
               per_time += * config.memory_access + config.miss_page_interrupt;
            } else { //在内存
 
               opt_total_time += * config.memory_access;
               per_time += * config.memory_access;
            }
         } else { //在快表
            opt_total_time += config.quick_table_access + config.memory_access;
            per_time += config.quick_table_access + config.memory_access;
         }
      }
      return per_time;
   }
 
   @Override
   public void run() {
      for (opt_i =; opt_i < config.taskSize; opt_i ++ ) {
         pause.lock();
 
         double per_time =;
         per_time = start(config.task[opt_i], per_time);
         String str="查找";
         String s = String.valueOf(config.task[opt_i]);
         snumber += str;
         snumber += s;
         snumber += ":";
 
         for (int j =; j < config.memory_num; j ++ ) {
            if (j < opt_memory_page.size()) {
               String s = String.valueOf(opt_memory_page.get(j));
               snumber += s;
               snumber += " ";
            } else {
               snumber+=" ";
            }
         }
         pause.unlock();
         BigDecimal bd = new BigDecimal(per_time);
         bd = bd.setScale(, RoundingMode.HALF_UP);
         snumber += "耗费时间:" + bd + "\n";
         Page.OPTtest.append(snumber);
         snumber = "";
         try {
            sleep(config.run_time);
         } catch (InterruptedException e) {
            e.printStackTrace();
         }
      }
      String s = String.valueOf(config.taskSize);
      s = String.valueOf(opt_lackpage);
      interruption = s + "次";
      double d = (double)opt_lackpage / config.taskSize *;
      BigDecimal bd = new BigDecimal(d);
      bd = bd.setScale(, RoundingMode.HALF_UP);
      opt_ave_time = (double)opt_total_time / config.taskSize;
      totalTime = String.valueOf(opt_total_time);
      BigDecimal bda = new BigDecimal(opt_ave_time);
      bda = bda.setScale(, RoundingMode.HALF_UP);
      avrTime = String.valueOf(bda);
      missPage = bd + "%";
      Page.opt_interrupt_label.setText(interruption);
      Page.opt_total_time_label.setText(totalTime);
      Page.opt_ave_time_label.setText(avrTime);
      Page.opt_miss_page_label.setText(missPage);
      // System.out.println("opt"+s);
      // System.out.println("opt"+opt_total_time);
      // System.out.println("opt"+opt_ave_time);
      // System.out.println("opt"+d + "%");
   }
}

连接数据库

保存记录

Save

 
package com.lr.db;
 
import java.sql.*;
 
import com.lr.frame.Page;
import com.lr.algurithm.config;
 
import javax.swing.*;
 
public class Save {
 
   private static String url = null;
   private static String username = null;
   private static String password = null;
 
   private static Connection conn = null;
   private static Statement st = null;
 
   public Save() {
      try {
         saveRecord();
      } catch (SQLException throwables) {
         throwables.printStackTrace();
      } catch (ClassNotFoundException e) {
         e.printStackTrace();
      } finally {
         if (st != null) {
            try {
               st.close();
            } catch (SQLException throwables) {
               throwables.printStackTrace();
            }
         }
         if (conn != null) {
            try {
               conn.close();
            } catch (SQLException throwables) {
               throwables.printStackTrace();
            }
         }
      }
   }
 
 
   public void saveRecord() throws SQLException, ClassNotFoundException {
      //.加载驱动
      //DriverManager.registerDriver(new com.mysql.jdbc.Driver());
      Class.forName("com.mysql.jdbc.Driver");//固定写法
 
      //.用户信息和
      url = "jdbc:mysql://.0.0.1:3306/os?useUnicode=true&characterEncoding=utf8&useSSL=true";
      username = "root";
      password = "";
 
      //.连接成功，数据库对象  Connection  代表数据库
      conn = DriverManager.getConnection(url, username, password);
      //.获得SQL的执行对象
      st = conn.createStatement();
 
      String sql = "INSERT INTO test(memory_n,page_n,page_list,memory_t,quick_table_t," +
            "interrupt_t,is_check,fifo_total_t,fifo_ave_t,fifo_miss_page,fifo_interrupt_n," +
            "fifo_text,lru_total_t,lru_ave_t,lru_miss_page,lru_interrupt_n,lru_text," +
            "lfu_total_t,lfu_ave_t,lfu_miss_page,lfu_interrupt_n,lfu_text,opt_total_t," +
            "opt_ave_t,opt_miss_page,opt_interrupt_n,opt_text)VALUES('" + config.memory_num + "','" +
            config.taskSize + "','" + Page.task_edit.getText() + "','" + config.memory_access + "','" +
            config.quick_table_access + "','" + config.miss_page_interrupt + "','" +
            config.is_check + "','" + Page.fifo_total_time_label.getText() +  "','" +
            Page.fifo_ave_time_label.getText() +  "','" + Page.fifo_miss_page_label.getText() +  "','" +
            Page.fifo_interrupt_label.getText() +  "','" + Page.FIFOtest.getText() + "','" +
            Page.lru_total_time_label.getText() +  "','" + Page.lru_ave_time_label.getText() +  "','" +
            Page.lru_miss_page_label.getText() +  "','" + Page.lru_interrupt_label.getText() +  "','" +
            Page.LRUtest.getText() + "','" + Page.lfu_total_time_label.getText() +  "','" +
            Page.lfu_ave_time_label.getText() +  "','" + Page.lfu_miss_page_label.getText() +  "','" +
            Page.lfu_interrupt_label.getText() +  "','" + Page.LFUtest.getText() + "','" +
            Page.opt_total_time_label.getText() +  "','" + Page.opt_ave_time_label.getText() +  "','" +
            Page.opt_miss_page_label.getText() +  "','" + Page.opt_interrupt_label.getText() +  "','" +
            Page.OPTtest.getText() + "')";
      int i = st.executeUpdate(sql);
      if (i >) {
         JOptionPane.showMessageDialog(null, "保存成功", "提交信息",);
      } else {
         JOptionPane.showMessageDialog(null, "保存失败", "warning", JOptionPane.ERROR_MESSAGE);
      }
 
   }
 
   public static void main(String[] args) {
      new Save();
   }
}

历史记录

History

 
package com.lr.db;
 
import javax.swing.*;
import java.awt.*;
import java.sql.*;
 
public class History {
   private static String url=null;
   private static String username=null;
   private static String password=null;
   private JFrame frame;
 
   public History() {
      frame = new JFrame("历史记录");
      // frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); // 退出应用程序默认窗口关闭
      // //获取与系统相关的默认工具类对象
      Toolkit toolkit = Toolkit.getDefaultToolkit();
      //获取屏幕分辨率
      Dimension d = toolkit.getScreenSize();
      frame.setBounds((int)(d.getWidth() -) / 2,(int)(d.getHeight() - 850) / 2,
, 850);
      frame.setVisible(true);
 
      try {
         historyRecord();
      } catch (ClassNotFoundException cnfe) {
         cnfe.printStackTrace();
         JOptionPane.showMessageDialog(null, "数据源错误", "错误", JOptionPane.ERROR_MESSAGE);
      } catch (SQLException sqle) {
         sqle.printStackTrace();
         JOptionPane.showMessageDialog(null, "数据操作错误", "错误", JOptionPane.ERROR_MESSAGE);
      }
 
 
   }
 
   public void historyRecord() throws SQLException, ClassNotFoundException {
      //.加载驱动
      //DriverManager.registerDriver(new com.mysql.jdbc.Driver());
      Class.forName("com.mysql.jdbc.Driver");//固定写法
 
      //.用户信息和
      url="jdbc:mysql://.0.0.1:3306/os?useUnicode=true&characterEncoding=utf8&useSSL=true";
      username="root";
      password="";
 
      //.连接成功，数据库对象  Connection  代表数据库
      Connection conn=DriverManager.getConnection(url,username,password);
 
      //.执行SQL的对象，去执行SQL，可能存在结果，返回结果信息
      String sql = "select * from test";
      PreparedStatement pstm = conn.prepareStatement(sql);
      ResultSet rs = pstm.executeQuery();
      // ResultSet rs=statement.executeQuery(sql);
      int count =;
      while (rs.next()) {
         count++;
      }
      rs = pstm.executeQuery();
 
      // 将查询获得的记录数据，转换成适合生成JTable的数据形式
      Object[][] info = new Object[count][];
 
      Object[] title = {"内存块数", "页面大小", " 页号序列", "内存存取时间", "快表存取时间",
            "中断执行时间", "是否勾选快表", "FIFO总时间", "FIFO平均时间", "FIFO缺页率",
            "FIFO中断次数", "FIFO执行过程", "LRU总时间", "LRU平均时间", "LRU缺页率",
            "LRU中断次数", "LRU执行过程", "LFU总时间", "LFU平均时间", "LFU缺页率",
            "LFU中断次数", "LFU执行过程", "OPT总时间", "OPT平均时间", "OPT缺页率",
            "OPT中断次数", "OPT执行过程"};
 
      count =;
      while (rs.next()) {
         // info[count][] = rs.getObject("id");
         info[count][] = rs.getObject("memory_n");
         info[count][] = rs.getObject("page_n");
         info[count][] = rs.getObject("page_list");
         info[count][] = rs.getObject("memory_t");
         info[count][] = rs.getObject("quick_table_t");
         info[count][] = rs.getObject("interrupt_t");
         info[count][] = rs.getObject("is_check");
         info[count][] = rs.getObject("fifo_total_t");
         info[count][] = rs.getObject("fifo_ave_t");
         info[count][] = rs.getObject("fifo_miss_page");
         info[count][] = rs.getObject("fifo_interrupt_n");
         info[count][] = rs.getObject("fifo_text");
         info[count][] = rs.getObject("lru_total_t");
         info[count][] = rs.getObject("lru_ave_t");
         info[count][] = rs.getObject("lru_miss_page");
         info[count][] = rs.getObject("lru_interrupt_n");
         info[count][] = rs.getObject("lru_text");
         info[count][] = rs.getObject("lfu_total_t");
         info[count][] = rs.getObject("lfu_ave_t");
         info[count][] = rs.getObject("lfu_miss_page");
         info[count][] = rs.getObject("lfu_interrupt_n");
         info[count][] = rs.getObject("lfu_text");
         info[count][] = rs.getObject("opt_total_t");
         info[count][] = rs.getObject("opt_ave_t");
         info[count][] = rs.getObject("opt_miss_page");
         info[count][] = rs.getObject("opt_interrupt_n");
         info[count][] = rs.getObject("opt_text");
         count++;
      }
 
      JTable table = new JTable(info, title);
 
      // 设置表格内容颜色
      table.setForeground(Color.BLACK);                   // 字体颜色
      table.setFont(new Font(null, Font.PLAIN,));      // 字体样式
      table.setSelectionForeground(Color.DARK_GRAY);      // 选中后字体颜色
      table.setSelectionBackground(Color.LIGHT_GRAY);     // 选中后字体背景
      table.setGridColor(Color.GRAY);                     // 网格颜色
 
      // 设置表头
      table.getTableHeader().setFont(new Font(null, Font.BOLD,));  // 设置表头名称字体样式
      table.getTableHeader().setForeground(Color.RED);                // 设置表头名称字体颜色
      table.getTableHeader().setReorderingAllowed(false);             // 设置不允许拖动重新排序各列
 
      // 设置行高
      table.setRowHeight();
 
      // 第一列列宽设置为
      table.getColumnModel().getColumn().setPreferredWidth(40);
 
      table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
      JScrollPane scroll = new JScrollPane(table);
 
      frame.add(scroll);
      frame.setVisible(true);
      frame.pack();
   }
 
   public static void main(String[] args) {
      new History();
   }
 
}

GUI界面

Page

 
package com.lr.frame;
 
import com.lr.algurithm.FIFO;
import com.lr.algurithm.LFU;
import com.lr.algurithm.LRU;
import com.lr.algurithm.OPT;
import com.lr.algurithm.config;
import com.lr.db.History;
import com.lr.db.Save;
 
import javax.swing.*;
import java.awt.*;
import java.util.Arrays;
import java.util.List;
 
public class Page {
   public JFrame frame;
   private JPanel panel;
   public static TextArea FIFOtest;
   public static TextArea LRUtest;
   public static TextArea LFUtest;
   public static TextArea OPTtest;
   public static JTextField task_edit;
   public static JTextField memory_num_edit;
   public static JTextField taskSize_edit;
   public static JTextField taskSize_low_edit;
   public static JTextField taskSize_high_edit;
   public static JTextField task_low_edit;
   public static JTextField task_high_edit;
   public static JCheckBox quick_table_check;
   public static JTextField memory_access_edit;
   public static JTextField quick_table_access_edit;
   public static JTextField miss_page_interrupt_edit;
   public static JTextField run_time_edit;
   public static JLabel fifo_interrupt_label;
   public static JLabel fifo_miss_page_label;
   public static JLabel fifo_total_time_label;
   public static JLabel fifo_ave_time_label;
   public static JLabel lru_interrupt_label;
   public static JLabel lru_miss_page_label;
   public static JLabel lru_total_time_label;
   public static JLabel lru_ave_time_label;
   public static JLabel lfu_interrupt_label;
   public static JLabel lfu_miss_page_label;
   public static JLabel lfu_total_time_label;
   public static JLabel lfu_ave_time_label;
   public static JLabel opt_interrupt_label;
   public static JLabel opt_miss_page_label;
   public static JLabel opt_total_time_label;
   public static JLabel opt_ave_time_label;
   public static JTextField quick_table_num_edit;
 
   FIFO fifo = new FIFO();
   LRU lru = new LRU();
   LFU lfu = new LFU();
   OPT opt = new OPT();
 
 
   public Page() {
      frame = new JFrame();
      frame.setTitle("页面置换算法");
      //获取与系统相关的默认工具类对象
      Toolkit toolkit = Toolkit.getDefaultToolkit();
      //获取屏幕分辨率
      Dimension d = toolkit.getScreenSize();
      frame.setBounds((int)(d.getWidth() -) / 2,(int)(d.getHeight() - 895) / 2,
, 895);
      frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); // 退出应用程序默认窗口关闭
      frame.getContentPane().setLayout(null);
      // frame.setVisible(true);
 
      panel = new JPanel();
      panel.setBounds(, 10, 1165, 890);
      frame.getContentPane().add(panel);
      panel.setLayout(null);
 
 
      JLabel label_ = new JLabel("内存块数:");
      label_.setBounds(35, 20, 100, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      memory_num_edit = new JTextField();
      memory_num_edit.setBounds(, 20, 180, 20);
      // frame.getContentPane().add(memory_num_edit);
      panel.add(memory_num_edit);
      // memory_num_edit.setColumns();
 
      JLabel label_ = new JLabel("页面数量：");
      label_.setBounds(35, 60, 100, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      taskSize_edit = new JTextField();
      taskSize_edit.setBounds(, 60, 180, 20);
      // frame.getContentPane().add(taskSize_edit);
      panel.add(taskSize_edit);
 
      taskSize_low_edit = new JTextField();
      taskSize_low_edit.setBounds(, 60, 40, 20);
      // frame.getContentPane().add(taskSize_low_edit);
      panel.add(taskSize_low_edit);
 
      JLabel label_ = new JLabel("-");
      label_.setBounds(525, 60, 10, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      taskSize_high_edit = new JTextField();
      taskSize_high_edit.setBounds(, 60, 40, 20);
      // frame.getContentPane().add(taskSize_high_edit);
      panel.add(taskSize_high_edit);
 
      JButton taskSize_btn = new JButton("随机生成");
      taskSize_btn.setBounds(, 55, 120, 30);
      taskSize_btn.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(taskSize_btn);
      panel.add(taskSize_btn);
      taskSize_btn.addActionListener(e -> {
         if (!taskSize_low_edit.getText().isEmpty()) {
            config.page_low = Integer.parseInt(taskSize_low_edit.getText());
         } else {
            config.page_low =;
         }
         if (!taskSize_high_edit.getText().isEmpty())
            config.page_high = Integer.parseInt(taskSize_high_edit.getText());
         else
            config.page_high =;
         // int r = (int) Math.random();
         config.taskSize = (int) (config.page_low + Math.random() * (config.page_high - config.page_low +));
         taskSize_edit.setText(String.valueOf(config.taskSize));
      });
 
      JLabel label_ = new JLabel("页面序号：");
      label_.setBounds(35, 100, 100, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      task_low_edit = new JTextField();
      task_low_edit.setBounds(, 100, 40, 20);
      // frame.getContentPane().add(task_low_edit);
      panel.add(task_low_edit);
 
      JLabel label_ = new JLabel("-");
      label_.setBounds(525, 100, 10, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      task_high_edit = new JTextField();
      task_high_edit.setBounds(, 100, 40, 20);
      // frame.getContentPane().add(task_high_edit);
      panel.add(task_high_edit);
 
      task_edit = new JTextField();
      task_edit.setBounds(, 100, 180, 20);
      // frame.getContentPane().add(task_edit);
      panel.add(task_edit);
 
      JButton task_btn = new JButton("随机生成");
      task_btn.setBounds(, 95, 120, 30);
      task_btn.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(task_btn);
      panel.add(task_btn);
      task_btn.addActionListener(e -> {
         if (!task_low_edit.getText().isEmpty()) {
            config.page_list_low = Integer.parseInt(task_low_edit.getText());
         } else {
            config.page_list_low =;
         }
         if (!task_high_edit.getText().isEmpty())
            config.page_list_high = Integer.parseInt(task_high_edit.getText());
         else
            config.page_list_high =;
         config.taskSize = Integer.parseInt(taskSize_edit.getText());
         String list = "";
         config.task = new int[config.taskSize];
         int i =;
         for (; i < config.taskSize -; i ++ ) {
            config.task[i] = (int) (config.page_list_low + Math.random() * (config.page_list_high - config.page_list_low +));
            list += config.task[i] + ",";
         }
         config.task[i] = (int) (config.page_list_low + Math.random() * (config.page_list_high - config.page_list_low +));
         list += config.task[i];
         task_edit.setText(list);
      });
 
      JLabel label_ = new JLabel("快表大小：");
      label_.setBounds(35, 145, 100, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      quick_table_num_edit = new JTextField();
      quick_table_num_edit.setBounds(, 145, 180, 20);
      // frame.getContentPane().add(quick_table_num_edit);
      panel.add(quick_table_num_edit);
      quick_table_num_edit.addActionListener(e -> {
         config.quick_table_num = Integer.parseInt(quick_table_num_edit.getText());
      });
      quick_table_num_edit.setEnabled(false);
 
      quick_table_check = new JCheckBox("启用快表");
      quick_table_check.setBounds(, 145, 130, 30);
      quick_table_check.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(quick_table_check);
      panel.add(quick_table_check);
      quick_table_check.addActionListener(e -> {
         on_quick_table_check_clicked(quick_table_check.isSelected());
      });
 
 
      JLabel label_ = new JLabel("内存存取时间：");
      label_.setBounds(700, 20, 140, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      memory_access_edit = new JTextField();
      memory_access_edit.setBounds(, 20, 50, 20);
      // frame.getContentPane().add(memory_access_edit);
      panel.add(memory_access_edit);
 
      JLabel label_ = new JLabel("ms");
      label_.setBounds(900, 20, 20, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      JLabel label_ = new JLabel("快表存取时间：");
      label_.setBounds(700, 60, 140, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      quick_table_access_edit = new JTextField();
      quick_table_access_edit.setBounds(, 60, 50, 20);
      // frame.getContentPane().add(quick_table_access_edit);
      panel.add(quick_table_access_edit);
 
      JLabel label_ = new JLabel("ms");
      label_.setBounds(900, 60, 20, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      JLabel label_ = new JLabel("缺页中断时间：");
      label_.setBounds(700, 100, 140, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      miss_page_interrupt_edit = new JTextField();
      miss_page_interrupt_edit.setBounds(, 100, 50, 20);
      // frame.getContentPane().add(miss_page_interrupt_edit);
      panel.add(miss_page_interrupt_edit);
 
      JLabel label_ = new JLabel("ms");
      label_.setBounds(900, 100, 20, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      JLabel label_ = new JLabel("执行时间控制：");
      label_.setBounds(700, 140, 140, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      run_time_edit = new JTextField();
      run_time_edit.setBounds(, 140, 50, 20);
      // frame.getContentPane().add(run_time_edit);
      panel.add(run_time_edit);
 
      JLabel label_ = new JLabel("ms");
      label_.setBounds(900, 140, 20, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      JButton start_btn = new JButton("开始执行");
      start_btn.setBounds(, 185, 120, 30);
      start_btn.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(start_btn);
      panel.add(start_btn);
      start_btn.addActionListener(e -> {
         on_clear_btn_clicked();
         config.memory_num = Integer.parseInt(memory_num_edit.getText());
         if (quick_table_check.isSelected()) {
            config.quick_table_num = Integer.parseInt(quick_table_num_edit.getText());
            if (quick_table_check.isSelected()  && config.quick_table_num >= config.memory_num) {
               JOptionPane.showMessageDialog(null, "快表大小应该小于内存大小", "warning", JOptionPane.ERROR_MESSAGE);
               return;
            }
         }
 
         config.memory_access = Double.parseDouble(memory_access_edit.getText());
         config.quick_table_access = Double.parseDouble(quick_table_access_edit.getText());
         config.miss_page_interrupt = Double.parseDouble(miss_page_interrupt_edit.getText());
         config.is_check = Boolean.parseBoolean(String.valueOf(quick_table_check.isSelected()));
         String str = task_edit.getText();
         List<String> lst = Arrays.asList(str.split(","));
         if (run_time_edit.getText().isEmpty()) {
            run_time_edit.setText("");
         }
         config.run_time = Integer.parseInt(run_time_edit.getText());
         config.taskSize = lst.size();
         config.task = new int[config.taskSize];
         for (int i =; i < config.taskSize; ++ i) {
            str = lst.get(i);
            config.task[i] = Integer.parseInt(str);
         }
         new Thread(() -> fifo.run()).start();
         new Thread(() -> lru.run()).start();
         new Thread(() -> lfu.run()).start();
         new Thread(() -> opt.run()).start();
 
      });
 
      JButton stop_continue_btn = new JButton("暂停执行");
      stop_continue_btn.setBounds(, 185, 120, 30);
      stop_continue_btn.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(stop_continue_btn);
      panel.add(stop_continue_btn);
      stop_continue_btn.addActionListener(e -> {
         if (stop_continue_btn.getText() == "暂停执行") {
            fifo.pause.lock();
            lru.pause.lock();
            lfu.pause.lock();
            opt.pause.lock();
            stop_continue_btn.setText("继续执行");
         } else {
            fifo.pause.unlock();
            lru.pause.unlock();
            lfu.pause.unlock();
            opt.pause.unlock();
            stop_continue_btn.setText("暂停执行");
         }
      });
 
      JButton stop_btn = new JButton("结束执行");
      stop_btn.setBounds(, 185, 120, 30);
      stop_btn.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(stop_btn);
      panel.add(stop_btn);
      stop_btn.addActionListener(e -> {
         System.exit();
      });
 
      // FIFO
      JLabel lblFifo = new JLabel("FIFO");
      title(lblFifo,, 250, 230, 50, 15);
 
      FIFOtest = new TextArea();
      textBox(FIFOtest,, 180, 250, 200, 250);
 
      // JScrollPane scroll_fifo = new JScrollPane(FIFOtest);
      // scroll(scroll_fifo,, 250, 200, 250);
 
      // LRU
      JLabel lblLru = new JLabel("LRU");
      title(lblLru,, 490, 230, 50, 15);
 
      LRUtest = new TextArea();
      textBox(LRUtest,, 420, 250, 200, 250);
 
      // JScrollPane scroll_lru = new JScrollPane(LRUtest);
      // scroll(scroll_lru,, 250, 200, 250);
 
      // LFU
      JLabel lblLfu = new JLabel("LFU");
      title(lblLfu,, 730, 230, 50, 15);
 
      LFUtest = new TextArea();
      textBox(LFUtest,, 660, 250, 200, 250);
 
      // JScrollPane scroll_lfu = new JScrollPane(LFUtest);
      // scroll(scroll_lfu,, 250, 200, 250);
 
      //OPT
      JLabel lblOpt = new JLabel("OPT");
      title(lblOpt,, 970, 230, 50, 15);
 
      OPTtest = new TextArea();
      textBox(OPTtest,, 900, 250, 200, 250);
 
      // JScrollPane scroll_opt= new JScrollPane(OPTtest);
      // scroll(scroll_opt,, 250, 200, 250);
 
      JLabel label_ = new JLabel("中断次数：");
      label_.setBounds(35, 550, 100, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      fifo_interrupt_label = new JLabel("");
      fifo_interrupt_label.setBounds(, 550, 100, 20);
      fifo_interrupt_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(fifo_interrupt_label);
      panel.add(fifo_interrupt_label);
 
      lru_interrupt_label = new JLabel("");
      lru_interrupt_label.setBounds(, 550, 100, 20);
      lru_interrupt_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(lru_interrupt_label);
      panel.add(lru_interrupt_label);
 
      lfu_interrupt_label = new JLabel("");
      lfu_interrupt_label.setBounds(, 550, 100, 20);
      lfu_interrupt_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(lfu_interrupt_label);
      panel.add(lfu_interrupt_label);
 
      opt_interrupt_label = new JLabel("");
      opt_interrupt_label.setBounds(, 550, 100, 20);
      opt_interrupt_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(opt_interrupt_label);
      panel.add(opt_interrupt_label);
 
      JLabel label_ = new JLabel("总时间：");
      label_.setBounds(35, 600, 100, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      fifo_total_time_label = new JLabel("");
      fifo_total_time_label.setBounds(, 600, 100, 20);
      fifo_total_time_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(fifo_total_time_label);
      panel.add(fifo_total_time_label);
 
      lru_total_time_label = new JLabel("");
      lru_total_time_label.setBounds(, 600, 100, 20);
      lru_total_time_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(lru_total_time_label);
      panel.add(lru_total_time_label);
 
      lfu_total_time_label = new JLabel("");
      lfu_total_time_label.setBounds(, 600, 100, 20);
      lfu_total_time_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(lfu_total_time_label);
      panel.add(lfu_total_time_label);
 
      opt_total_time_label = new JLabel("");
      opt_total_time_label.setBounds(, 600, 100, 20);
      opt_total_time_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(opt_total_time_label);
      panel.add(opt_total_time_label);
 
      JLabel label_ = new JLabel("平均时间：");
      label_.setBounds(35, 650, 100, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      fifo_ave_time_label = new JLabel("");
      fifo_ave_time_label.setBounds(, 650, 100, 20);
      fifo_ave_time_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(fifo_ave_time_label);
      panel.add(fifo_ave_time_label);
 
      lru_ave_time_label = new JLabel("");
      lru_ave_time_label.setBounds(, 650, 100, 20);
      lru_ave_time_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(lru_ave_time_label);
      panel.add(lru_ave_time_label);
 
      lfu_ave_time_label = new JLabel("");
      lfu_ave_time_label.setBounds(, 650, 100, 20);
      lfu_ave_time_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(lfu_ave_time_label);
      panel.add(lfu_ave_time_label);
 
      opt_ave_time_label = new JLabel("");
      opt_ave_time_label.setBounds(, 650, 100, 20);
      opt_ave_time_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(opt_ave_time_label);
      panel.add(opt_ave_time_label);
 
      JLabel label_ = new JLabel("缺页率：");
      label_.setBounds(35, 700, 100, 20);
      label_.setFont(new Font("宋体", Font.PLAIN, 20));
      // frame.getContentPane().add(label_);
      panel.add(label_);
 
      fifo_miss_page_label = new JLabel("");
      fifo_miss_page_label.setBounds(, 700, 100, 20);
      fifo_miss_page_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(fifo_miss_page_label);
      panel.add(fifo_miss_page_label);
 
      lru_miss_page_label = new JLabel("");
      lru_miss_page_label.setBounds(, 700, 100, 20);
      lru_miss_page_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(lru_miss_page_label);
      panel.add(lru_miss_page_label);
 
      lfu_miss_page_label = new JLabel("");
      lfu_miss_page_label.setBounds(, 700, 100, 20);
      lfu_miss_page_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(lfu_miss_page_label);
      panel.add(lfu_miss_page_label);
 
      opt_miss_page_label = new JLabel("");
      opt_miss_page_label.setBounds(, 700, 100, 20);
      opt_miss_page_label.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(opt_miss_page_label);
      panel.add(opt_miss_page_label);
 
      JButton save_btn = new JButton("保存");
      save_btn.setBounds(, 760, 120, 30);
      save_btn.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(save_btn);
      panel.add(save_btn);
      save_btn.addActionListener(e -> {
         new Save();
      });
 
      JButton open_btn = new JButton("打开");
      open_btn.setBounds(, 760, 120, 30);
      open_btn.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(open_btn);
      panel.add(open_btn);
      open_btn.addActionListener(e -> {
         new History();
      });
 
      JButton clear_btn = new JButton("清空");
      clear_btn.setBounds(, 760, 120, 30);
      clear_btn.setFont(new Font("宋体", Font.PLAIN,));
      // frame.getContentPane().add(clear_btn);
      panel.add(clear_btn);
      clear_btn.addActionListener(e->{
         on_clear_btn_clicked();
         clear_parameter();
      });
   }
 
   /**
    * 四种算法标题
    * @param label
    * @param size
    * @param x
    * @param y
    * @param w
    * @param h
    */
   public void title(JLabel label, int size, int x, int y ,int w, int h) {
      label.setFont(new Font("宋体", Font.PLAIN, size));
      label.setBounds(x, y, w, h);
      // frame.getContentPane().add(label);
      panel.add(label);
   }
 
   /**
    * 四种算法运行结果显示框
    * @param textArea
    * @param size
    * @param x
    * @param y
    * @param w
    * @param h
    */
   public void textBox(TextArea textArea, int size, int x, int y ,int w, int h) {
      textArea.setFont(new Font("宋体", Font.PLAIN, size));
      textArea.setBackground(SystemColor.controlHighlight);
      textArea.setBounds(x, y, w, h);
      // frame.getContentPane().add(textArea);
      panel.add(textArea);
   }
 
   /**
    * 分别设置水平和垂直滚动条自动出现
    * @param scrollPane
    * @param x
    * @param y
    * @param w
    * @param h
    */
   public void scroll(JScrollPane scrollPane,int x, int y, int w, int h) {
      scrollPane.setLocation(x, y);
      scrollPane.setSize(w, h);
 
      scrollPane.setHorizontalScrollBarPolicy(
            JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
      scrollPane.setVerticalScrollBarPolicy(
            JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
      // frame.getContentPane().add(scrollPane);
      panel.add(scrollPane);
   }
 
   public void on_clear_btn_clicked() {
      // fifo.task[] = new int[fifo.taskSize];
      final int[] task = config.task;
      FIFOtest.setText("");
      fifo.fifo_lackpage =;
      fifo.fifo_ave_time=;
      fifo.fifo_total_time=;
      fifo.fifo_memory_page.clear();
      fifo.fifo_quick_table_page.clear();
      fifo.fifo_memory_page.clear();
      fifo_interrupt_label.setText("");
      fifo_miss_page_label.setText("");
      fifo_total_time_label.setText("");
      fifo_ave_time_label.setText("");
      LRUtest.setText("");
      lru.lru_lackpage =;
      lru.lru_ave_time=;
      lru.lru_total_time=;
      lru.lru_memory_page.clear();
      lru.lru_quick_table_page.clear();
      lru_interrupt_label.setText("");
      lru_miss_page_label.setText("");
      lru_total_time_label.setText("");
      lru_ave_time_label.setText("");
      LFUtest.setText("");
      lfu.lfu_lackpage =;
      lfu.lfu_ave_time=;
      lfu.lfu_total_time=;
      lfu.lfu_memory_page.clear();
      lfu.lfu_quick_table_page.clear();
      lfu_interrupt_label.setText("");
      lfu_miss_page_label.setText("");
      lfu_total_time_label.setText("");
      lfu_ave_time_label.setText("");
      OPTtest.setText("");
      opt.opt_lackpage =;
      opt.opt_ave_time=;
      opt.opt_total_time=;
      opt.opt_memory_page.clear();
      opt.opt_quick_table_page.clear();
      opt_interrupt_label.setText("");
      opt_miss_page_label.setText("");
      opt_total_time_label.setText("");
      opt_ave_time_label.setText("");
 
   }
 
   public static void on_quick_table_check_clicked(boolean checked) {
      if (checked)
         quick_table_num_edit.setEnabled(true);
      else
         quick_table_num_edit.setEnabled(false);
   }
 
   public static void clear_parameter() {
      memory_num_edit.setText("");
      taskSize_edit.setText("");
      taskSize_low_edit.setText("");
      taskSize_high_edit.setText("");
      task_low_edit.setText("");
      task_high_edit.setText("");
      task_edit.setText("");
      quick_table_num_edit.setText("");
      memory_access_edit.setText("");
      quick_table_access_edit.setText("");
      miss_page_interrupt_edit.setText("");
      run_time_edit.setText("");
      quick_table_check.setSelected(false);
      quick_table_num_edit.setEnabled(false);
   }
 
   public static void main(String[] args) {
      Page window = new Page();
      window.frame.setVisible(true);
   }
}

	package com.lr.algurithm;

	public class config {

	public static int page_low =;
	public static int page_high =;
	public static int page_list_low =;
	public static int page_list_high =;

	public static int run_time =;

	public static int quick_table_num =;//快表大小
	public static int memory_num =;//内存块数
	public static double memory_access =;//内存存取时间
	public static double quick_table_access =;//快表存取时间
	public static double miss_page_interrupt =;//缺页中断处理时间
	public static int taskSize =;//页面序列数量
	public static int[] task = new int[taskSize];//页面序列存放
	public static boolean is_check=false;//快表启用判断

	}

	package com.lr.algurithm;

	import com.lr.frame.Page;
	import sun.awt.Mutex;

	import java.math.BigDecimal;
	import java.math.RoundingMode;
	import java.util.ArrayList;
	import java.util.List;

	public class FIFO extends Thread{

	private int fifo_i =;
	public int fifo_lackpage=;//缺页数
	public double fifo_ave_time=;//平均时间
	public double fifo_total_time=;//总时间
	public List<Integer> fifo_memory_page = new ArrayList<>();//内存现有页数存放
	public List<Integer> fifo_quick_table_page = new ArrayList<>();//快表现有页数存放
	public Mutex pause = new Mutex();
	public String snumber = new String();
	public String interruption = new String();
	public String totalTime = new String();
	public String avrTime = new String();
	public String missPage = new String();

	public double start(int a, double per_time) {
	if (!config.is_check) { //无快表模式
	if (!fifo_memory_page.contains(a)) { //不在内存，产生缺页中断
	fifo_lackpage ++ ;
	if (fifo_memory_page.size() < config.memory_num)
	fifo_memory_page.add(a);
	else {
	fifo_memory_page.remove();
	fifo_memory_page.add(a);
	}
	fifo_total_time += * config.memory_access + config.miss_page_interrupt;
	per_time += * config.memory_access + config.miss_page_interrupt;
	} else {
	fifo_total_time += * config.memory_access;
	per_time += * config.memory_access;
	}
	}
	else { //快表模式
	if (!fifo_quick_table_page.contains(a)) { //不在快表
	if (!fifo_memory_page.contains(a)) { //不在内存，产生缺页中断
	fifo_lackpage ++ ;
	if (fifo_memory_page.size() < config.memory_num) //内存块未满,直接调入
	fifo_memory_page.add(a);
	else {
	fifo_memory_page.remove();
	fifo_memory_page.add(a);
	}

	//快表置换用FIFO
	if (fifo_quick_table_page.size() < config.quick_table_num)
	fifo_quick_table_page.add(a);
	else {
	fifo_quick_table_page.remove();
	fifo_quick_table_page.add(a);
	}
	fifo_total_time += * config.memory_access + config.miss_page_interrupt;
	per_time += * config.memory_access + config.miss_page_interrupt;
	} else { //在内存
	fifo_total_time += * config.memory_access;
	per_time += * config.memory_access;
	}
	} else { //在快表
	fifo_total_time += config.quick_table_access + config.memory_access;
	per_time += config.quick_table_access + config.memory_access;;
	}
	}
	return per_time;
	}

	@Override
	public void run() {
	super.run();
	for(fifo_i =; fifo_i < config.taskSize; fifo_i ++ ) {
	pause.lock();

	double per_time =;
	per_time = start(config.task[fifo_i], per_time);
	String str="查找";
	String s = String.valueOf(config.task[fifo_i]);
	snumber += str;
	snumber += s;
	snumber += ":";

	for (int j =; j < config.memory_num; j ++ ) {
	if (j < fifo_memory_page.size()) {
	String s = String.valueOf(fifo_memory_page.get(j));
	snumber += s;
	snumber += " ";
	}
	else {
	snumber += " ";
	}
	}
	pause.unlock();
	BigDecimal bd = new BigDecimal(per_time);
	bd = bd.setScale(, RoundingMode.HALF_UP);
	snumber += "耗费时间:" + bd + "\n";
	Page.FIFOtest.append(snumber);
	snumber = "";
	try {
	sleep(config.run_time);//睡眠ms
	} catch (InterruptedException e) {
	e.printStackTrace();
	}
	}
	String s = String.valueOf(config.taskSize);
	s = String.valueOf(fifo_lackpage);
	interruption = s + "次";

	// emit fifo_updata(s+"次","interrupt_label");
	double d = (double)fifo_lackpage / config.taskSize *;
	BigDecimal bd = new BigDecimal(d);
	bd = bd.setScale(, RoundingMode.HALF_UP);
	totalTime = String.valueOf(fifo_total_time);
	fifo_ave_time = fifo_total_time / config.taskSize;
	BigDecimal bda = new BigDecimal(fifo_ave_time);
	bda = bda.setScale(, RoundingMode.HALF_UP);
	avrTime = String.valueOf(bda);
	missPage = bd + "%";
	Page.fifo_interrupt_label.setText(interruption);
	Page.fifo_total_time_label.setText(totalTime);
	Page.fifo_ave_time_label.setText(avrTime);
	Page.fifo_miss_page_label.setText(missPage);
	// System.out.println("fifo:"+s);
	// System.out.println("fifo:"+fifo_total_time);
	// System.out.println("fifo:"+fifo_ave_time);
	// System.out.println("fifo:"+d + "%");

	}
	}

	package com.lr.algurithm;

	import com.lr.frame.Page;
	import com.lr.tool.Node;
	import sun.awt.Mutex;

	import java.math.BigDecimal;
	import java.math.RoundingMode;
	import java.util.ArrayList;
	import java.util.List;

	public class LFU extends Thread {

	private int lfu_i =;
	public int lfu_lackpage=;//缺页数
	public double lfu_ave_time=;//平均时间
	public double lfu_total_time=;//总时间
	public List<Node> lfu_memory_page = new ArrayList<>();//内存现有页数存放
	public List<Integer> lfu_quick_table_page = new ArrayList<>();//快表现有页数存放
	public Mutex pause = new Mutex();
	public String snumber = new String();
	public String interruption = new String();
	public String totalTime = new String();
	public String avrTime = new String();
	public String missPage = new String();

	public double start(int a, double per_time) {
	if(!config.is_check) { //无快表模式
	boolean flag = true;
	int index =;
	for (Node map:lfu_memory_page) {
	if(map.key == a) {
	flag = false;
	break;
	}
	index ++ ;
	}

	if (flag) { //不在内存
	lfu_lackpage ++ ;
	//内存满，删去访问频率最小的那个，相等的频率按fifo删除
	if(lfu_memory_page.size() >= config.memory_num) {
	Node min_obj;
	min_obj = lfu_memory_page.get();
	for (Node pair : lfu_memory_page) {
	if (pair.value < min_obj.value) {
	min_obj = pair;
	}
	}
	lfu_memory_page.remove(min_obj);
	}
	lfu_memory_page.add(new Node(a));
	lfu_total_time += * config.memory_access + config.miss_page_interrupt;
	per_time += * config.memory_access + config.miss_page_interrupt;
	} else {

	lfu_memory_page.get(index).value++;
	lfu_total_time += * config.memory_access;
	per_time += * config.memory_access;
	}
	} else { //快表模式
	if(!lfu_quick_table_page.contains(a))//不在快表
	{
	boolean flag = true;
	int index =;
	for (Node map : lfu_memory_page) {
	if (map.key == a) {
	flag = false;
	break;
	}
	index ++ ;
	}

	if (flag) { //不在内存
	lfu_lackpage ++ ;
	//内存满，删去访问频率最小的那个，相等的频率按lfu删除
	if (lfu_memory_page.size() >= config.memory_num) {
	Node min_obj;
	min_obj = lfu_memory_page.get();
	for (Node map : lfu_memory_page) {
	if(map.value < min_obj.value) {
	min_obj = map;
	}
	}
	lfu_memory_page.remove(min_obj);
	}

	lfu_memory_page.add(new Node(a));

	//快表置换用FIFO
	if (lfu_quick_table_page.size() < config.quick_table_num) {
	lfu_quick_table_page.add(a);
	} else {
	lfu_quick_table_page.remove();
	lfu_quick_table_page.add(a);
	}

	lfu_total_time += * config.memory_access + config.miss_page_interrupt;
	per_time += * config.memory_access + config.miss_page_interrupt;
	} else { //在内存
	lfu_memory_page.get(index).value++;

	lfu_total_time += * config.memory_access;
	per_time += * config.memory_access;
	}
	} else { //在快表
	int index =;
	for (Node map : lfu_memory_page) {
	if(map.key == a) {
	lfu_memory_page.get(index).value++;
	break;
	}
	index++;
	}
	lfu_total_time += config.quick_table_access + config.memory_access;
	per_time += config.quick_table_access + config.memory_access;
	}
	}
	return per_time;
	}

	@Override
	public void run() {
	for(lfu_i =; lfu_i < config.taskSize; lfu_i ++ ) {
	pause.lock();
	double per_time =;
	per_time = start(config.task[lfu_i], per_time);
	String str = "查找";
	String s = String.valueOf(config.task[lfu_i]);
	snumber += str;
	snumber += s;
	snumber += ":";

	for (int j =; j < config.memory_num; j ++) {
	if (j < lfu_memory_page.size()) {
	String s = String.valueOf(lfu_memory_page.get(j).key);
	snumber+=s;
	snumber+=" ";
	} else {
	snumber+=" ";
	}
	}
	pause.unlock();
	BigDecimal bd = new BigDecimal(per_time);
	bd = bd.setScale(, RoundingMode.HALF_UP);
	snumber += "耗费时间:" + bd + "\n";
	Page.LFUtest.append(snumber);
	snumber = "";
	try {
	sleep(config.run_time);
	} catch (InterruptedException e) {
	e.printStackTrace();
	}
	}
	String s = String.valueOf(config.taskSize);
	s = String.valueOf(lfu_lackpage);
	interruption = s + "次";
	double d = (double)lfu_lackpage / config.taskSize *;
	BigDecimal bd = new BigDecimal(d);
	bd = bd.setScale(, RoundingMode.HALF_UP);
	lfu_ave_time = (double)lfu_total_time / config.taskSize;
	totalTime = String.valueOf(lfu_total_time);
	BigDecimal bda = new BigDecimal(lfu_ave_time);
	bda = bda.setScale(, RoundingMode.HALF_UP);
	avrTime = String.valueOf(bda);
	missPage = bd + "%";
	Page.lfu_interrupt_label.setText(interruption);
	Page.lfu_total_time_label.setText(totalTime);
	Page.lfu_ave_time_label.setText(avrTime);
	Page.lfu_miss_page_label.setText(missPage);
	// System.out.println("lfu"+s);
	// System.out.println("lfu"+lfu_total_time);
	// System.out.println("lfu"+lfu_ave_time);
	// System.out.println("lfu"+d + "%");
	}
	}

	package com.lr.tool;

	public class Node {
	public int key;
	public int value;
	public Node() {
	key =;
	value =;
	}
	public Node(int Key) {
	key = Key;
	value =;
	}

	public Node(int a, int i) {
	}
	}

	package com.lr.db;

	import java.sql.*;

	import com.lr.frame.Page;
	import com.lr.algurithm.config;

	import javax.swing.*;

	public class Save {

	private static String url = null;
	private static String username = null;
	private static String password = null;

	private static Connection conn = null;
	private static Statement st = null;

	public Save() {
	try {
	saveRecord();
	} catch (SQLException throwables) {
	throwables.printStackTrace();
	} catch (ClassNotFoundException e) {
	e.printStackTrace();
	} finally {
	if (st != null) {
	try {
	st.close();
	} catch (SQLException throwables) {
	throwables.printStackTrace();
	}
	}
	if (conn != null) {
	try {
	conn.close();
	} catch (SQLException throwables) {
	throwables.printStackTrace();
	}
	}
	}
	}


	public void saveRecord() throws SQLException, ClassNotFoundException {
	//.加载驱动
	//DriverManager.registerDriver(new com.mysql.jdbc.Driver());
	Class.forName("com.mysql.jdbc.Driver");//固定写法

	//.用户信息和
	url = "jdbc:mysql://.0.0.1:3306/os?useUnicode=true&characterEncoding=utf8&useSSL=true";
	username = "root";
	password = "";

	//.连接成功，数据库对象 Connection 代表数据库
	conn = DriverManager.getConnection(url, username, password);
	//.获得SQL的执行对象
	st = conn.createStatement();

	String sql = "INSERT INTO test(memory_n,page_n,page_list,memory_t,quick_table_t," +
	"interrupt_t,is_check,fifo_total_t,fifo_ave_t,fifo_miss_page,fifo_interrupt_n," +
	"fifo_text,lru_total_t,lru_ave_t,lru_miss_page,lru_interrupt_n,lru_text," +
	"lfu_total_t,lfu_ave_t,lfu_miss_page,lfu_interrupt_n,lfu_text,opt_total_t," +
	"opt_ave_t,opt_miss_page,opt_interrupt_n,opt_text)VALUES('" + config.memory_num + "','" +
	config.taskSize + "','" + Page.task_edit.getText() + "','" + config.memory_access + "','" +
	config.quick_table_access + "','" + config.miss_page_interrupt + "','" +
	config.is_check + "','" + Page.fifo_total_time_label.getText() + "','" +
	Page.fifo_ave_time_label.getText() + "','" + Page.fifo_miss_page_label.getText() + "','" +
	Page.fifo_interrupt_label.getText() + "','" + Page.FIFOtest.getText() + "','" +
	Page.lru_total_time_label.getText() + "','" + Page.lru_ave_time_label.getText() + "','" +
	Page.lru_miss_page_label.getText() + "','" + Page.lru_interrupt_label.getText() + "','" +
	Page.LRUtest.getText() + "','" + Page.lfu_total_time_label.getText() + "','" +
	Page.lfu_ave_time_label.getText() + "','" + Page.lfu_miss_page_label.getText() + "','" +
	Page.lfu_interrupt_label.getText() + "','" + Page.LFUtest.getText() + "','" +
	Page.opt_total_time_label.getText() + "','" + Page.opt_ave_time_label.getText() + "','" +
	Page.opt_miss_page_label.getText() + "','" + Page.opt_interrupt_label.getText() + "','" +
	Page.OPTtest.getText() + "')";
	int i = st.executeUpdate(sql);
	if (i >) {
	JOptionPane.showMessageDialog(null, "保存成功", "提交信息",);
	} else {
	JOptionPane.showMessageDialog(null, "保存失败", "warning", JOptionPane.ERROR_MESSAGE);
	}

	}

	public static void main(String[] args) {
	new Save();
	}
	}

	package com.lr.db;

	import javax.swing.*;
	import java.awt.*;
	import java.sql.*;

	public class History {
	private static String url=null;
	private static String username=null;
	private static String password=null;
	private JFrame frame;

	public History() {
	frame = new JFrame("历史记录");
	// frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); // 退出应用程序默认窗口关闭
	// //获取与系统相关的默认工具类对象
	Toolkit toolkit = Toolkit.getDefaultToolkit();
	//获取屏幕分辨率
	Dimension d = toolkit.getScreenSize();
	frame.setBounds((int)(d.getWidth() -) / 2,(int)(d.getHeight() - 850) / 2,
	, 850);
	frame.setVisible(true);

	try {
	historyRecord();
	} catch (ClassNotFoundException cnfe) {
	cnfe.printStackTrace();
	JOptionPane.showMessageDialog(null, "数据源错误", "错误", JOptionPane.ERROR_MESSAGE);
	} catch (SQLException sqle) {
	sqle.printStackTrace();
	JOptionPane.showMessageDialog(null, "数据操作错误", "错误", JOptionPane.ERROR_MESSAGE);
	}


	}

	public void historyRecord() throws SQLException, ClassNotFoundException {
	//.加载驱动
	//DriverManager.registerDriver(new com.mysql.jdbc.Driver());
	Class.forName("com.mysql.jdbc.Driver");//固定写法

	//.用户信息和
	url="jdbc:mysql://.0.0.1:3306/os?useUnicode=true&characterEncoding=utf8&useSSL=true";
	username="root";
	password="";

	//.连接成功，数据库对象 Connection 代表数据库
	Connection conn=DriverManager.getConnection(url,username,password);

	//.执行SQL的对象，去执行SQL，可能存在结果，返回结果信息
	String sql = "select * from test";
	PreparedStatement pstm = conn.prepareStatement(sql);
	ResultSet rs = pstm.executeQuery();
	// ResultSet rs=statement.executeQuery(sql);
	int count =;
	while (rs.next()) {
	count++;
	}
	rs = pstm.executeQuery();

	// 将查询获得的记录数据，转换成适合生成JTable的数据形式
	Object[][] info = new Object[count][];

	Object[] title = {"内存块数", "页面大小", " 页号序列", "内存存取时间", "快表存取时间",
	"中断执行时间", "是否勾选快表", "FIFO总时间", "FIFO平均时间", "FIFO缺页率",
	"FIFO中断次数", "FIFO执行过程", "LRU总时间", "LRU平均时间", "LRU缺页率",
	"LRU中断次数", "LRU执行过程", "LFU总时间", "LFU平均时间", "LFU缺页率",
	"LFU中断次数", "LFU执行过程", "OPT总时间", "OPT平均时间", "OPT缺页率",
	"OPT中断次数", "OPT执行过程"};

	count =;
	while (rs.next()) {
	// info[count][] = rs.getObject("id");
	info[count][] = rs.getObject("memory_n");
	info[count][] = rs.getObject("page_n");
	info[count][] = rs.getObject("page_list");
	info[count][] = rs.getObject("memory_t");
	info[count][] = rs.getObject("quick_table_t");
	info[count][] = rs.getObject("interrupt_t");
	info[count][] = rs.getObject("is_check");
	info[count][] = rs.getObject("fifo_total_t");
	info[count][] = rs.getObject("fifo_ave_t");
	info[count][] = rs.getObject("fifo_miss_page");
	info[count][] = rs.getObject("fifo_interrupt_n");
	info[count][] = rs.getObject("fifo_text");
	info[count][] = rs.getObject("lru_total_t");
	info[count][] = rs.getObject("lru_ave_t");
	info[count][] = rs.getObject("lru_miss_page");
	info[count][] = rs.getObject("lru_interrupt_n");
	info[count][] = rs.getObject("lru_text");
	info[count][] = rs.getObject("lfu_total_t");
	info[count][] = rs.getObject("lfu_ave_t");
	info[count][] = rs.getObject("lfu_miss_page");
	info[count][] = rs.getObject("lfu_interrupt_n");
	info[count][] = rs.getObject("lfu_text");
	info[count][] = rs.getObject("opt_total_t");
	info[count][] = rs.getObject("opt_ave_t");
	info[count][] = rs.getObject("opt_miss_page");
	info[count][] = rs.getObject("opt_interrupt_n");
	info[count][] = rs.getObject("opt_text");
	count++;
	}

	JTable table = new JTable(info, title);

	// 设置表格内容颜色
	table.setForeground(Color.BLACK); // 字体颜色
	table.setFont(new Font(null, Font.PLAIN,)); // 字体样式
	table.setSelectionForeground(Color.DARK_GRAY); // 选中后字体颜色
	table.setSelectionBackground(Color.LIGHT_GRAY); // 选中后字体背景
	table.setGridColor(Color.GRAY); // 网格颜色

	// 设置表头
	table.getTableHeader().setFont(new Font(null, Font.BOLD,)); // 设置表头名称字体样式
	table.getTableHeader().setForeground(Color.RED); // 设置表头名称字体颜色
	table.getTableHeader().setReorderingAllowed(false); // 设置不允许拖动重新排序各列

	// 设置行高
	table.setRowHeight();

	// 第一列列宽设置为
	table.getColumnModel().getColumn().setPreferredWidth(40);

	table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
	JScrollPane scroll = new JScrollPane(table);

	frame.add(scroll);
	frame.setVisible(true);
	frame.pack();
	}

	public static void main(String[] args) {
	new History();
	}

	}

Java实现FIFO、LRU、LFU、OPT页面置换算法

目录

题目要求

具体代码