两个线程交替打印AB10次

最新推荐文章于 2025-03-20 22:47:40 发布

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最新推荐文章于 2025-03-20 22:47:40 发布

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分类专栏： java学习文章标签： java

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public class PrintAB {
    public static int DEFUALT_TIMES = 10;

    public static void main(String[] args) {

        GuardObject lock = new GuardObject();

        new Thread(() -> {
            int i = DEFUALT_TIMES;
            while (i-->0) {
                lock.printA();
            }
        }, "t1").start();
        new Thread(() -> {
            int i = DEFUALT_TIMES;
            while (i-->0) {
                lock.printB();
            }
        }, "t2").start();
    }
}
class GuardObject {

    private boolean flag = true;


    public void printA() {
        synchronized (this) {
            while (!this.flag) {
                try {
                    this.wait();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            System.out.print("A");
            flag = false;
            notifyAll();
        }

    }

    public void printB() {
        synchronized (this) {
            while (this.flag) {
                try {
                    this.wait();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            System.out.print("B");
            flag = true;
            notifyAll();
        }

    }

}