死锁的代码，这样写对吗？

Java编写，死锁：

class HoldLock implements Runnable{
    private String lockA;
    private String lockB;
    public HoldLock(String lockA,String lockB) {
        this.lockA = lockA;
        this.lockB = lockB;
    }
    @Override
    public void run() {
        synchronized (lockA) {
            System.out.println(Thread.currentThread().getName()+"\t自己持有："+lockA+"\t尝试获得"+lockB);
            try {TimeUnit.SECONDS.sleep(3);} catch (InterruptedException e) {e.printStackTrace();}
            synchronized (lockB) {
                System.out.println(Thread.currentThread().getName()+"\t自己持有："+lockB+"\t尝试获得"+lockA);
            }
        }
    }
}
public class DeadLockDemo {
    public static void main(String[] args) {
        String lockA = "lockA";
        String lockB = "lockB";
        new Thread(new HoldLock(lockA,lockB),"ThreadAA").start();
        new Thread(new HoldLock(lockB,lockA),"ThreadBB").start();
    }
}

努力变秃吧！