三个线程按顺序打印分别打印ABC_三个线程分别打印abcjava-优快云博客

本文通过一个Java代码示例，展示了如何使用ReentrantLock和Condition进行线程间的同步控制，实现三个线程按特定顺序交替打印字符。

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public static Lock lock = new ReentrantLock();
    public static int count = 1;
    public static Condition condition1 = lock.newCondition();
    public static Condition condition2 = lock.newCondition();
    public static Condition condition3 = lock.newCondition();

    public static Thread thread1 = new Thread(() -> {

        while (count < 100) {
            lock.lock();
            System.out.println("A:" + count);
            count ++;
            condition2.signal();
            try {
                condition1.await();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

            lock.unlock();
        }
    });

    public static Thread thread2 = new Thread(() -> {

        while (count < 100) {
            lock.lock();

            System.out.println("B:" + count);
            count ++;
            condition3.signal();
            try {
                condition2.await();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

            lock.unlock();
        }

    });

    public static Thread thread3 = new Thread(() -> {
        while (count < 100) {
            lock.lock();

            System.out.println("C:" + count);
            count ++;
            condition1.signal();
            try {
                condition3.await();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            lock.unlock();
        }
    });

    public static void main (String[] args) {
        thread1.start();

        try {
            Thread.sleep(1l);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        thread2.start();
        try {
            Thread.sleep(1l);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        thread3.start();

    }