3个线程交替输出abc

package com.kang.multithread;

/**
 * @author klr
 * @create 2020-09-16-11:11
 */
public class AlternateOutput {

    static final Object lock = new Object();
    static boolean con1 = false;
    static boolean con2 = false;

    public static void main(String[] args) throws InterruptedException {
        Thread t1 = new Thread(()->{
            synchronized (lock) {
                for (int i = 0; i < 5; i++) {
                    while (con1 || con2) {
                        try {
                            lock.wait();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    System.out.println("a");
                    con1 = true;
                    lock.notifyAll();
                }
            }
        },"t1");

        Thread t2 = new Thread(()->{
            synchronized (lock) {
                for (int i = 0; i < 5; i++) {
                    while (!con1) {
                        try {
                            lock.wait();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    System.out.println("b");
                    con1=false;
                    con2=true;
                    lock.notifyAll();
                }

            }
        },"t2");

        Thread t3 = new Thread(()->{
            synchronized (lock) {
                for (int i = 0; i < 5; i++) {
                    while (!con2) {
                        try {
                            lock.wait();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    System.out.println("c");
                    con2=false;
                    lock.notifyAll();
                }

            }
        },"t3");


        t1.start();
        t2.start();
        t3.start();
        t1.join();
        t2.join();
        t3.join();
    }



}