java多线程问题中死锁的一个实现

1.直接上代码：

class LockDemo{
	public static final Object A_LOCK=new Object();
	public static final Object B_LOCK=new Object();
}
public class ThreadLockDemo implements Runnable{
	public boolean flag;
	public ThreadLockDemo(boolean flag)
	{
		this.flag=flag;
	}
	public void run()
	{
		if(flag)
		{
			synchronized (LockDemo.A_LOCK) {
				System.out.println("if  A_LOCK");
				synchronized (LockDemo.B_LOCK) {
					System.out.println("B_LOCK");
				}
				
			}
		}
		else
		{
			synchronized (LockDemo.B_LOCK) {
				System.out.println("else B_LOCK");
				synchronized (LockDemo.A_LOCK) {
					System.out.println("A_LOCK");
				}
			}
		}
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		ThreadLockDemo td1=new ThreadLockDemo(false);
		ThreadLockDemo td2=new ThreadLockDemo(true);
		Thread t1=new Thread(td1);
		Thread t2=new Thread(td2);
		t1.start();
		t2.start();
	}

}

2.有图有真相