jlab0801.java

华中科技大学JAVA课程所有实验源码及截图 本校的同学可以不用辛苦地敲键盘了 外校同学可以看看

public class JLab0801{
	public static void main(String[] args){
		PrintThread thread1,thread2,thread3,thread4;
		thread1=new PrintThread("thread1");
		thread2=new PrintThread("thread2");
		thread3=new PrintThread("thread3");
		thread4=new PrintThread("thread4");
		System.err.println("\nStarting threads");
		thread1.start();
		thread2.start();
		thread3.start();
		thread4.start();
		System.err.println("Threads started\n");
		}
	}
	
class PrintThread extends Thread{
	private int sleepTime;
	public PrintThread(String name){
		super(name);
		sleepTime=(int)(Math.random()*5000);
		System.err.println("Name:"+getName()+";sleep:"+sleepTime);
		}
	public void run(){
		try{
			System.err.println(getName()+" going to sleep");
			Thread.sleep(sleepTime);
			}catch(InterruptedException e){
				System.err.println(e.toString());
				}
		System.err.println(getName()+"done sleeping");
		}
	}