《java 多线程中的死锁》

class Dead implements Runnable//实现接口
{
	private boolean flag;
	Dead(boolean flag)
	{
		this.flag = flag;
	}
	public void run()
	{
		if (flag)
		{
			while (true)
			{
				//同步代码块
				synchronized(Locks.obj1)//锁1
				{
					System.out.println("if 1 启动！");
					synchronized(Locks.obj2)//锁2
					{
						System.out.println("if 2 启动!");
					}
				}
			}
		}
		else
		{
			while (true)
			{
				synchronized(Locks.obj2)//锁2
				{
					System.out.println("else 2 启动！");
					synchronized(Locks.obj1)//锁1
					{
						System.out.println("else 1 启动！");
					}
				}
			}
		}
	}

}

class Locks//定义锁对象
{
	static Object obj1 = new Object();
	static Object obj2 = new Object();
}

class  DeadLock
{
	public static void main(String[] args) 
	{
		Thread t1 = new Thread(new Dead(true));//开启两个线程
		Thread t2 = new Thread(new Dead(false));

		t1.start();//启动两个线程
		t2.start();
	}
}