关于实现线程死锁的一个例子

关于实现线程死锁的一个例子
线程对象class DeadLock

 {
    //模拟两个对象
    private final Object obj1 = new Object();
    private final Object obj2 = new Object();
    public static void main(String[] args){
        DeadLock dl = new DeadLock();
        dl.testDeadLock();
        //System.out.println("Hello World!");
        }
    public void testDeadLock(){ 
        new Thread(new Runnable(){  
            public void run(){     
                testSync(obj1,obj2);
                System.out.println("obj1...");  
            }       
        }).start();  
        
        new Thread(new Runnable(){  
            public void run(){
                testSync(obj2,obj1);
                System.out.println("obj2...");  
                }    
            }).start();
    }
    
    public static void testSync(Object obj,Object obje){   
        synchronized(obj){
            try{ Thread.sleep(2*1000);
            }catch(Exception e){
                e.printStackTrace();
            }
        }
        synchronized(obje){
            try{ 
                Thread.sleep(2*1000);
            }catch(Exception e){
                e.printStackTrace();
            }
        }
    }
}