multithread.java.bak

java下的多线程的实现

public class multithread
{	
	
	public static void main(String[] args)
	{
			
		MyThread t1 = new MyThread("First");
		MyThread t2 = new MyThread("Second");
		new Thread(t1).start();
		new Thread(t2).start();
		
	}
}

class MyThread implements Runnable
{
	String id;
	int counter=0;
	public boolean stopFlag;
	multithread instance;
	
	MyThread(String id)
	{
		this.id=id;
		
	}
	
	public void run()
	{
		stopFlag=false;
		
		System.out.println(id+"start:");
		while(!stopFlag)
		{
			synchronized(counter)
			{
				System.out.println(id+":"+counter++);
				try
				{
					Thread.sleep((int)(1000*Math.random()));
				}
				catch(Exception e){}
				if(counter>20)stopFlag=true;
			}
		}
	}
	
}