priority.java

Java_JDK_实例宝典书中的源码

package book.thread;


public class Priority {
	
	static class MyThread extends Thread{
		private int ID = 0;
		public MyThread(int id){
			this.ID = id;
		}
		public void run(){
			System.out.println("MyThread-" + this.ID + 
					" begin! Priority: " + this.getPriority());

			System.out.println("MyThread-" + this.ID + " end!");
		}
	}

	public static void main(String[] args) {
		//建立3个优先级不同的线程
		MyThread[] myThreads = new MyThread[3];
		for (int i=0; i<3; i++){
			myThreads[i] = new MyThread(i+1);
			//三个线程的优先级分别是1，4，7
			myThreads[i].setPriority(i*3+1);
		}
		//按优先级从低到高启动线程
		for (int i=0; i<3; i++){
			myThreads[i].start();
		}
		//先启动的线程不一定先运行，虚拟机会考虑线程的优先级，同等情况下，优先级高的线程先运行
	}
}