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1、顺序输出

比如，必须先2后1。

• wait与notify实现

  static final Object lock = new Object();//表示t2是否运行过static boolean t2runned = false;public static void main(String[] args) {     	Thread t1 = new Thread(() -> {             synchronized (lock) {                 while (!t2runned) {                     try {                         locak.wait();                } catch (InterruptedException e) {                     	e.printStackTrace();                }            }            log.debug("1");        }    },"t1");        Thread t2 = new Thread(() -> {             synchronized (lock) {                 log.debug("2");            t2runned = true;            lock.notify();        }    },"t2");        t1.start();    t2.start();}

• park与unpark实现

2、交替输出

• wait与notify实现

  /*输出内容		等待标记		下一个标记a				1				2b				2				3c				3				1*/class WaitNotify {         //打印    public void print(String str,int waitFlag, int nextFlag) {         	synchronized(this) {             	while(flag != waitFlag) {                 	try {                     	this.wait();                } catch (InterruptedExcepton e) {                     	e.printStackTrace();                }            }            System.out.print(str);            flag = nextFlag;            this.notifyAll();        }    }        	//等待标记    private int flag;    //循环次数    private int loopNumber;        public WaitNotify(int flag,int loopNumber) {         	this.flag = flag;        this.loopNumber = loopNumber;    }}

• await与singal实现

• park与unpark实现

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