package 多个线程交替打印ABC;

import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;

/**
 * Created with IntelliJ IDEA.
 *
 * @Author: AlenXu
 * @Date: 2024/03/20/10:10
 * @Description:
 */
public class ThreadLoopPrint {
    // 共享计数器
    private static int sharedCounter = 0;

    public static void main(String[] args) {
        // 打印内容
        String printStr = "ABC";

        // 定义循环栅栏
        CyclicBarrier cyclicBarrier = new CyclicBarrier(3, () -> System.out.println());

        // 执行任务
        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                for (int i = 0; i < printStr.length(); i++) {
                    synchronized (this) {
                        sharedCounter = sharedCounter > 2 ? 0 : sharedCounter; // 循环打印
                        System.out.print(printStr.toCharArray()[sharedCounter++]);
                    }
                    try {
                        // 等待3个线程都打印过一遍，继续下一轮
                        cyclicBarrier.await();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    } catch (BrokenBarrierException e) {
                        e.printStackTrace();
                    }
                }
            }
        };

        // 开启多个线程
        new Thread(runnable).start();
        new Thread(runnable).start();
        new Thread(runnable).start();
    }
}