wait(100L)意思为:不占用CPU,线程等待100毫秒
notify():唤醒正在排队等待同步资源的线程优先级最高者结束等待。
notifyAll():唤醒所有正在排队等待同步资源的线程。
并且这三个方法必须在synchronized块内执行否则会报异常
让两个线程循环打印1-100比如a打印1,b打印1,a2,b2
package com.thread.test1; public class TestPrintOne { /** * @param args */ public static void main(String[] args) { PrintOne one = new PrintOne(); Thread t1 = new Thread(one); Thread t2 = new Thread(one); t1.setName("1"); t2.setName("2"); t1.start(); t2.start(); } } class PrintOne implements Runnable { @Override public void run() { for (int i = 0; i <= 100; i++) { synchronized (this) { //进入同步块的时候进行唤醒 notifyAll(); System.out .println(Thread.currentThread().getName() + "打印的" + i); try { wait(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } }