线程休眠：我们希望人为地控制线程，使得正在执行的线程暂停，将CPU让给别的线程，我们可以使用静态方法sleep(long millis),该方法可以让当前正在执行的线程暂停一段时间，进入休眠等待状态。

线程让步：线程让步可以通过yield() 方法来实现，该方法和sleep()有点相似，都可以让当前正在运行的线程暂停，区别在于yield()方法不会阻塞该线程，他只是将线程转换成就绪状态，让系统调度器重新调度一次。当某个线程调用yield()方法之后，只有与当前线程优先级相同或者更高的线程才能获得执行的机会。

线程休眠简单实例：

public class ThreadSleep {    public static void main(String[] args) {        new Thread(new SleepThread()).start();                for(int i=1;i<=10;i++) {            if(i == 5) {                System.out.println("mainThread start sleep!");                try {                    Thread.sleep(20000);                } catch (InterruptedException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }            System.out.println("mainThread is inputting:"+i);                        try {                Thread.sleep(500);            } catch (InterruptedException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }            }}class SleepThread implements Runnable {    @Override    public void run() {        // TODO Auto-generated method stub        for (int i = 0; i < 10; i++) {            if (i == 3) {                System.out.println("deputyThread start sleep!");                try {                    Thread.sleep(5000);                } catch (InterruptedException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }            System.out.println("deputyThread is inputting:"+i);            try {                Thread.sleep(500);            } catch (InterruptedException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }    }}

 

线程让步简单实例：

public class ThreadYield {	public static void main(String[] args) {				new Thread(new YieldThread(),"Thread A").start();		new Thread(new YieldThread(),"Thread B").start();		new Thread(new YieldThread(),"Thread C").start();		new Thread(new YieldThread(),"Thread E").start();		new Thread(new YieldThread(),"Thread F").start();		new Thread(new YieldThread(),"Thread G").start();		new Thread(new YieldThread(),"Thread H").start();			}		}class YieldThread implements Runnable{	@Override	public void run() {		// TODO Auto-generated method stub		for(int i = 0;i <=10;i++) {			if(i == 4) {				System.out.println(Thread.currentThread().getName()+" that is inputting "+i+" has yielded!");				continue;			}			System.out.println(Thread.currentThread().getName()+" is inputting :"+i);		}					}	}