java面试题---请用多线程写死锁

java面试题---用多线程写死锁

（请参考本博客对同步锁的文章进行理解）

public class dead {public static void main(String[] args) {// TODO Auto-generated method stubThreadOne one=new ThreadOne();ThreadTwo two=new ThreadTwo();sharing obj1=new sharing();sharing obj2=new sharing();one.obj1=obj1;one.obj2=obj2;two.obj1=obj1;two.obj2=obj2;one.obj1=two.obj2;one.obj2=two.obj1;one.start();two.start();}}class sharing{}class ThreadOne extends Thread{sharing obj1;sharing obj2;public void run(){synchronized (obj1) {System.out.println("我进入了ThreadOne外部锁");synchronized (obj2) {System.out.println("我进入了ThreadOne内部锁");}}}}class ThreadTwo extends Thread{sharing obj1;sharing obj2;public void run(){synchronized (obj1) {System.out.println("我进入了ThreadTwo外部锁");synchronized (obj2) {System.out.println("我进入了ThreadTwo内部锁");}}}}

打印输出：

我进入了ThreadOne外部锁
我进入了ThreadTwo外部锁

（两个线程都在等在同步资源释放自己的锁，一直处于等待状态）