进程管理系统的实现,包括进程的创建、调度、通信、撤消等功能实现以上功能的Java代码
时间: 2023-12-26 19:05:31 浏览: 36
以下是一个简单的Java程序,演示了进程管理系统的实现,包括进程的创建、调度、通信、撤消等功能。
```java
import java.util.*;
public class ProcessManagementSystem {
private Queue<Process> readyQueue; // 就绪队列
private List<Process> processList; // 进程列表
private int currPid; // 当前进程ID
private int nextPid; // 下一个进程ID
public ProcessManagementSystem() {
readyQueue = new LinkedList<>();
processList = new ArrayList<>();
currPid = -1;
nextPid = 0;
}
// 创建进程
public Process createProcess(int priority, int memory) {
Process p = new Process(nextPid, priority, memory);
processList.add(p);
nextPid++;
return p;
}
// 将进程加入就绪队列
public void addToReadyQueue(Process p) {
readyQueue.offer(p);
}
// 进程调度
public Process schedule() {
Process p = readyQueue.poll();
if (p != null) {
currPid = p.getPid();
}
return p;
}
// 进程通信
public void sendMessage(Process sender, Process receiver, String message) {
receiver.receiveMessage(sender, message);
}
// 进程撤销
public void terminateProcess(Process p) {
processList.remove(p);
if (p.getPid() == currPid) {
currPid = -1;
}
}
// 获取就绪队列
public Queue<Process> getReadyQueue() {
return readyQueue;
}
// 获取进程列表
public List<Process> getProcessList() {
return processList;
}
// 获取当前进程ID
public int getCurrPid() {
return currPid;
}
// 获取下一个进程ID
public int getNextPid() {
return nextPid;
}
}
class Process {
private int pid; // 进程ID
private int priority; // 进程优先级
private int memory; // 进程占用内存
private List<String> mailbox; // 进程信箱
public Process(int pid, int priority, int memory) {
this.pid = pid;
this.priority = priority;
this.memory = memory;
mailbox = new ArrayList<>();
}
// 接收消息
public void receiveMessage(Process sender, String message) {
mailbox.add(message);
System.out.println("Process " + pid + " received message from Process " + sender.getPid() + ": " + message);
}
// 获取进程ID
public int getPid() {
return pid;
}
// 获取进程优先级
public int getPriority() {
return priority;
}
// 获取进程占用内存
public int getMemory() {
return memory;
}
// 获取进程信箱
public List<String> getMailbox() {
return mailbox;
}
}
class Main {
public static void main(String[] args) {
ProcessManagementSystem pms = new ProcessManagementSystem();
Process p1 = pms.createProcess(1, 100);
Process p2 = pms.createProcess(2, 200);
pms.addToReadyQueue(p1);
pms.addToReadyQueue(p2);
Process currProcess = pms.schedule();
if (currProcess != null) {
System.out.println("Current process: " + currProcess.getPid());
}
pms.sendMessage(p1, p2, "Hello, Process 2!");
pms.terminateProcess(p1);
List<Process> processList = pms.getProcessList();
System.out.println("Process list: ");
for (Process p : processList) {
System.out.println("Process " + p.getPid() + ", priority: " + p.getPriority() + ", memory: " + p.getMemory());
}
}
}
```
以上是一个简单的进程管理系统的实现,包括进程的创建、调度、通信、撤消等功能。
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