实现代码

public class PrintNumber {public static void main(String[] args) {Print print = new Print();new Thread(print, "线程1").start();new Thread(print, "线程2").start();}}class Print implements Runnable {private int num = 1;@Overridepublic void run() {while (true) {synchronized (this) {notify();try {Thread.sleep(100);} catch (InterruptedException e) {e.printStackTrace();}System.out.println(Thread.currentThread().getName() + "打印：" + num);num++;if (num >= 100) {break;}try {wait();} catch (InterruptedException e) {e.printStackTrace();}}}}
}

演示视频