prioritytest.java.bak

Java程序设计培训教程2

class PriorityTest {
	public static void main(String args[]) {
		SubThread Obj1 = new SubThread("John");
		/*将Obj1的优先级设置为最低*/
		Obj1.setPriority(Thread.MIN_PRIORITY);
		/*启动Obj1线程*/
		Obj1.start();	
		/*声明线程对象Obj2,优先级为缺省优先级*/
		SubThread Obj2 = new SubThread("Tom");
		/*启动Obj2线程*/
		Obj2.start();
		/*声明线程对象Obj3*/
		SubThread Obj3 = new SubThread("Jennifer");
		/*启动Obj3线程*/
		Obj3.start();
		/*生成线程对象Obj4*/
		SubThread Obj4 = new SubThread("May");
		/*将Obj4的优先级设置为最高*/
		Obj4.setPriority(Thread.MAX_PRIORITY);
		/*启动Obj4线程*/
		Obj4.start();
	}
}
/*下面是SubThread类的定义，该类是Thread类的子类*/
class SubThread extends Thread {
	int num = 13;
	SubThread(String str) {
		super(str);
	}
	/*run()方法输出线程运行信息*/
	public void run() {
		/*输出提示信息*/
		System.out.println(getName() + " begins running");
		for(int i = 0; i < num; i++) {
			/*输出当前时刻正在运行的线程*/
			System.out.println("Step " + i + ": " + getName() + " ，priority ：" + getPriority());
		}
		/*显示运行完的线程名称*/
		System.out.println(getName() + " finished");
	}
}