biased_demo

public class Test {

    class MyLock {

    }
    final Object lock = new MyLock();

    public static void main(String[] args) {
        new Test().test();
    }

    public void test() {
        new Thread(new Runnable() {
            @Override
            public void run() {
                System.out.println("1. get lock prepare");
                synchronized (lock) {
                    System.out.println("1. get lock success");

                }
                new CustomThread().start();

            }
        }).start();
    }


    class CustomThread extends  Thread {
        @Override
        public void run() {
            synchronized (lock) {
                System.out.println("2. get lock success");
            }
        }
    }

}