class LockMethod {
    private String lockA;
    private String lockB;

    LockMethod(String lockA, String lockB) {
        this.lockA = lockA;
        this.lockB = lockB;
    }

    public void LockA() throws InterruptedException {
        //拿到A锁
        synchronized (lockA) {
            System.out.println(Thread.currentThread().getName() + "获取A锁" + lockA);
            TimeUnit.MILLISECONDS.sleep(100);
            synchronized (lockB) {
               //TODO
            }
        }
    }

    public void LockB() throws InterruptedException {
        //拿到B锁
        synchronized (lockB) {
            System.out.println(Thread.currentThread().getName() + "获取B锁" + lockB);
            TimeUnit.MILLISECONDS.sleep(100);
            synchronized (lockA) {
               //TODO
            }
        }
    }
}

public class DeadLock {
    public static void main(String[] args) {
        LockMethod method = new LockMethod("q", "w");
        new Thread(() -> {
            try {
                method.LockA();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }, "线程1").start();
        new Thread(() -> {
            try {
                method.LockB();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }, "线程2").start();
    }
}