一、说明：

经典的线程交互的例子

二、代码：

public class TestThreadAlternate {

    public static void main(String[] args) throws IllegalAccessException, InstantiationException {
        ThreadAlternateDemo.class.newInstance().exec();
    }
}

/**
 * 经典的线程交互的例子
 */
class ThreadAlternateDemo {

    Object lock = new Object();

    char[] arrayInt = "1234567890".toCharArray();
    char[] arrayChar = "abcdefghij".toCharArray();

    public void exec() {

        new Thread(() -> {
            synchronized (lock) {
                for (char c : arrayInt) {
                    try {
                        lock.notify();
                        lock.wait();  // 让出锁
                        System.out.print(c);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }

                lock.notify();
            }
        }, "t1").start();


        new Thread(() -> {
            synchronized (lock) {
                for (char c : arrayChar) {
                    try {
                        System.out.print(c);
                        lock.notify();
                        lock.wait();  // 让出锁
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                lock.notify();
            }
        }, "t2").start();

    }

}

三、运行结果：

image.png