【多线程】Java并发中的锁（草稿）

可重入锁Synchronized

public class DemoTest {
    public static void main(String[] args) {
        final DemoTest demoTest = new DemoTest();

        Thread thread1 = new Thread(new Runnable() {
            @Override
            public void run() {
                System.out.println(Thread.currentThread().getName() + "run");
                demoTest.method1();
            }
        });
        thread1.setName("thread-1");
        thread1.start();

        Thread thread2 = new Thread(new Runnable() {
            @Override
            public void run() {
                System.out.println(Thread.currentThread().getName() + "run");
                demoTest.method2();
            }
        });
        thread2.setName("thread-2");
        thread2.start();
    }

    public synchronized void method1() {
        System.out.println("method1 run in" + Thread.currentThread().getName());
        try {
            Thread.sleep(1000);
            method2();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    public synchronized void method2() {
        System.out.println("method2 run in" + Thread.currentThread().getName());
    }

}

运行结果

thread-1run
method1 run inthread-1
thread-2run
method2 run inthread-1
method2 run inthread-2

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