sleep()、join()、interrupt()的使用

    package demo.thread; 
     
    /**
     *sleep()是静态方法，是属于类的，作用是让当前线程阻塞 
     *join()是使线程同步，如在某个线程里调用t.join()表示t线程执行完再执行当前线程
     *interrupt()给线程设定一个标志表示该线程已被中断，但在异常捕获时将清理这个标志
     *所以在catch子句中，该标志为false 
     */ 
    public class SleepJoinDemo { 
        public static void main(String[] args) { 
            Sleeper sleep1 = new Sleeper("sleep1", 1500); 
            Sleeper sleep2 = new Sleeper("sleep2", 1500); 
            Joiner join1 = new Joiner("join1", sleep1); 
            Joiner join2 = new Joiner("join2", sleep1); 
            sleep2.interrupt(); 
        } 
    } 
     
    class Sleeper extends Thread { 
        // 可以传参设定睡眠时间 
        private int sleepTime; 
     
        public Sleeper(String name, int sleepTime) { 
            super(name); 
            this.sleepTime = sleepTime; 
            start();// 在构造方法中启动 
        } 
     
        @Override 
        public void run() { 
            try { 
                sleep(sleepTime); 
            } catch (InterruptedException e) { 
                System.out.println(getName() + " was interrupted.\n" 
                        + "isInterrupted():" + isInterrupted()); 
                return; 
            } 
            System.out.println(getName() + " has awakened"); 
        } 
    } 
     
    class Joiner extends Thread { 
        private Sleeper sleeper; 
     
        public Joiner(String name, Sleeper sleeper) { 
            super(name); 
            this.sleeper = sleeper; 
            start(); 
        } 
     
        public void run() { 
            try { 
                sleeper.join();//合并，异步变同步 
            } catch (InterruptedException e) { 
                System.out.println("interrupted"); 
            } 
            System.out.println(getName() + " join completed"); 
        } 
    }