线程优先级

/*
 * 线程的优先级1-10
 * 1.MAX_PRIORITY 10
 * 2.MIN_PRIORITY 1
 * 3.默认是 5
 * 优先级高代表执行的概率会高一点，不是必然会先执行。
 * 
 */
public class MyPriority extends Thread {
	@Override
	public void run() {
		System.err.println(Thread.currentThread().getName() + "--" + Thread.currentThread().getPriority());
	}

	public static void main(String[] args) {
		MyPriority mp = new MyPriority();
		Thread t1 = new Thread(mp);
		Thread t2 = new Thread(mp);
		Thread t3 = new Thread(mp);
		Thread t4 = new Thread(mp);
		Thread t5 = new Thread(mp);
		Thread t6 = new Thread(mp);
		t1.setPriority(MAX_PRIORITY);
		t2.setPriority(MAX_PRIORITY);
		t3.setPriority(MAX_PRIORITY);
		t4.setPriority(MIN_PRIORITY);
		t5.setPriority(MIN_PRIORITY);
		t6.setPriority(MIN_PRIORITY);
		t1.start();
		t2.start();
		t3.start();
		t4.start();
		t5.start();
		t6.start();
	}

}

执行结果：
Thread-1–10
Thread-2–10
Thread-4–1
Thread-3–10
Thread-6–1
Thread-5–1