请用JAVA语言编写和调试一个进程调度程序,实现基于优先权的进程调度算法
时间: 2024-02-13 19:00:40 浏览: 25
好的,以下是一个基于优先权的进程调度程序的JAVA代码:
```
import java.util.*;
class Process {
int id;
String name;
int priority;
int runtime;
public Process(int id, String name, int priority, int runtime) {
this.id = id;
this.name = name;
this.priority = priority;
this.runtime = runtime;
}
}
public class PriorityScheduler {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("请输入进程数量:");
int n = scanner.nextInt();
List<Process> processes = new ArrayList<>();
for (int i = 0; i < n; i++) {
System.out.print("请输入进程" + (i + 1) + "的信息(ID 进程名 优先级 运行时间,以空格分隔):");
int id = scanner.nextInt();
String name = scanner.next();
int priority = scanner.nextInt();
int runtime = scanner.nextInt();
processes.add(new Process(id, name, priority, runtime));
}
System.out.print("请输入每个时间片的长度(分钟):");
int timeSlice = scanner.nextInt();
int currentTime = 0;
int totalTurnaroundTime = 0;
int totalWaitingTime = 0;
int totalResponseTime = 0;
System.out.println("时间\t进程ID\t进程名\t优先级\t运行时间\t状态");
while (!processes.isEmpty()) {
// 根据优先级排序
processes.sort((p1, p2) -> p2.priority - p1.priority);
Process process = processes.get(0);
System.out.print(currentTime + "\t" + process.id + "\t" + process.name + "\t" + process.priority + "\t" + process.runtime);
if (process.runtime <= timeSlice) {
// 进程运行完毕
currentTime += process.runtime;
totalTurnaroundTime += currentTime;
totalResponseTime += currentTime;
processes.remove(process);
System.out.println("\t完成");
} else {
// 进程执行一个时间片
currentTime += timeSlice;
process.runtime -= timeSlice;
process.priority++;
totalWaitingTime += currentTime;
totalResponseTime += currentTime;
System.out.println("\t执行中");
}
}
double avgTurnaroundTime = (double) totalTurnaroundTime / n;
double avgWaitingTime = (double) totalWaitingTime / n;
double avgResponseTime = (double) totalResponseTime / n;
System.out.println("平均周转时间:" + avgTurnaroundTime);
System.out.println("平均等待时间:" + avgWaitingTime);
System.out.println("平均响应时间:" + avgResponseTime);
}
}
```
该程序首先从用户输入中读取进程的信息,然后根据优先级选择要执行的进程,并模拟进程的执行过程。程序会输出每个进程的运行状况,并最终统计系统整体的平均周转时间,平均等待时间,平均响应时间。
需要注意的是,该程序仅仅是一个简单的示例程序,并没有考虑很多实际的情况,比如进程的抢占、进程的阻塞等。如果需要实现一个更加完善的进程调度程序,需要考虑更加复杂的情况。