java实现操作系统的短进程作业调度示例分享__zhouzhuan_finishtime_weightzhouzhuan_arrivetime_starttime_

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java实现操作系统的短进程作业调度示例分享

来源: 互联网发布时间：2014-11-02

本文导语: 代码如下:package com; import java.util.Arrays; public class sjf { public static void main(String[] args) { sjf SJF=new sjf(); SJF.fun1(); } int starttime; int arrivetime; int finishtime; int zhouzhuan; public void fun1(){ int a[]={1,3,2}; int c[...

代码如下:

package com;

import java.util.Arrays;
public class sjf {

  public static void main(String[] args) {
   sjf SJF=new sjf();
   SJF.fun1();
  }

  int starttime;
  int arrivetime;
  int finishtime;
  int zhouzhuan;

  public void fun1(){

   int a[]={1,3,2};
   int c[]=new int[3];
   for (int i = 0; i < 3; i++) {
    c[i]=a[i];
   }
   Arrays.sort(c);
   finishtime=a[0];
   int[]d={0,3,3};
   int zhouzhuan=finishtime-arrivetime;
   float weightzhouzhuan=(float)zhouzhuan/a[0];//位权周转时间为周转时间h
   System.out.println("开始时间"+starttime+"t"+"到达时间"
     +arrivetime+"t"+"完成时间"+finishtime+"t"+"周转时间"+zhouzhuan+"t"+"服务时间"+a[0]+"t"+"带权周转时间"+weightzhouzhuan);

   for (int i = 1; i < 3; i++) {
    arrivetime=d[i];
    if(finishtime>=arrivetime){
     starttime=finishtime;
     finishtime+=c[i];
     zhouzhuan=finishtime-arrivetime;
     weightzhouzhuan=(float)zhouzhuan/c[i];
     System.out.println("开始时间"+starttime+"t"+"到达时间"
       +arrivetime+"t"+"完成时间"+finishtime+"t"+"周转时间"+zhouzhuan+"t"+"服务时间"+c[i]+"t"+"带权周转时间"+weightzhouzhuan);
    }else{

     Arrays.sort(c);
     starttime=arrivetime;
     finishtime=starttime+c[i];
     zhouzhuan=finishtime-arrivetime;
     weightzhouzhuan=(float)zhouzhuan/c[i];
     System.out.println("开始时间"+starttime+"t"+"到达时间"
       +arrivetime+"t"+"完成时间"+finishtime+"t"+"周转时间"+zhouzhuan+"t"+"服务时间"+c[i]+"t"+"带权周转时间"+weightzhouzhuan);

    }


   }
  }