Java多線程-線程的調度(優先級)

與線程休眠類似，線程的優先級仍然無法保障線程的執行次序。只不過，優先級高的線程獲取CPU資源的概率較大，優先級低的並非沒機會執行。

線程的優先級用1-10之間的整數表示，數值越大優先級越高，默認的優先級為5。

在一個線程中開啟另外一個新線程，則新開線程稱為該線程的子線程，子線程初始優先級與父線程相同。

package cn.thread;

/**
 * 線程的調度(優先級)
 * 
 * @author 林計欽
 * @version 1.0 2013-7-24 上午09:30:42
 */
public class ThreadPriority {
    
    public static void main(String[] args) {
           ThreadPriority thread=new ThreadPriority();
           Thread t1 = thread.new MyThread1(); 
           Thread t2 = new Thread(thread.new MyRunnable()); 
           t1.setPriority(10); 
           t2.setPriority(1); 

           t2.start(); 
           t1.start(); 
    }
    
    class MyThread1 extends Thread {
        public void run() {
            for (int i = 0; i < 10; i++) {
                System.out.println("線程1第" + i + "次執行！");
                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    class MyRunnable implements Runnable {
        public void run() {
            for (int i = 0; i < 10; i++) {
                System.out.println("線程2第" + i + "次執行！");
                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}