mutlithreaddemo5.java

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// 例4.2.5 MutliThreadDemo5.java
class NewThread extends Thread
{
	private int count;
	private boolean isPass = true;   // 定义一个标志，用来终止循环
	NewThread( String name )
	{
		super(name);
	}
	public void run()
	{
		while(isPass)  // isPass为假时将中止循环，否则count不断的加1
		{
			count++;
		}
	}
	public int result()  // 返回count的值
	{
		return count;
	}
	public void stopThread()   // 中止线程
	{
		isPass = false;
	}
}
class MutliThreadDemo5
{
	public static void main( String[] args) 
{ 
		NewThread t1 = new NewThread("Thread 1");  
		NewThread t2 = new NewThread("Thread 2");
		t1.setPriority(Thread.NORM_PRIORITY-3); //设置优先级为2
		t2.setPriority(Thread.NORM_PRIORITY+3); //设置优先级为8
		t1.start();    // 启动线程t1
		t2.start();    // 启动线程t2
		try
        {
			Thread.sleep(500); // 主线程睡眠500毫秒
		}catch(InterruptedException e){
			System.out.println(e.getMessage());
		}
		System.out.println("Thread 1：Priority is "+t1.getPriority()
+" Result of Count is: "+t1.result());
		System.out.println("Thread 2：Priority is "+t2.getPriority()
+" Result of Count is: "+t2.result());
		t1.setPriority(Thread.MAX_PRIORITY);  //重新设置t1的优先级为最大
		try{
			Thread.sleep(500); // 主线程睡眠500毫秒
		}catch(InterruptedException e){
			System.out.println(e.getMessage());
		}
		t1.stopThread();
		t2.stopThread();
		System.out.println("After the priority of Thread 1 is changed: ");
		System.out.println("Thread 1：Priority is "+t1.getPriority()
+" Result of Count is: "+t1.result());
		System.out.println("Thread 2：Priority is "+t2.getPriority()
+" Result of Count is: "+t2.result());
	}
}