Sample Code deadlock

package com.dq;

public class ThreadTest implements Runnable
{
	// 2个对象代表2把锁
	Object obj1 = new Object();
	Object obj2 = new Object();
	
	@Override
	public void run() 
	{
		if(Thread.currentThread().getName().equals("thread1"))
		{
			synchronized (obj1) 
			{
				System.out.println("得到obj1,准备进入obj2锁方法块");
				try 
				{
					Thread.sleep(20); //休眠的目的是为了让另一个线程获得执行机会得到另一把锁
				} 
				catch (InterruptedException e) 
				{
					e.printStackTrace();
				}
				synchronized (obj2) 
				{
					System.out.println("线程1进入obj2方法块");
				}
			}
		}	
		else
		{
			synchronized (obj2) 
			{
				System.out.println("得到obj2,准备进入obj1锁方法块");
				try 
				{
					Thread.sleep(20);
				} 
				catch (InterruptedException e) 
				{
					e.printStackTrace();
				}
				synchronized (obj1) 
				{
					System.out.println("线程2进入obj1方法块");
				}
			}
		}	
	}
	
	public static void main(String[] args) 
	{
		ThreadTest task = new ThreadTest();
		Thread thread1 = new Thread(task,"thread1");
		Thread thread2 = new Thread(task,"thread2");
		thread1.start();
		thread2.start();
	}
}