java基础（死锁）

/*
 死锁（同步中嵌套同步，而使用不同的锁）
   
 */
class Test implements Runnable
{
	private boolean flag = true;
	Test(boolean flag)
	{
		this.flag=flag;
	}
	public void run()
	{
		if(flag)
		{
			synchronized(Lock.a)
			{
				System.out.println("ia");
				synchronized(Lock.b)
				{
					System.out.println("ib");
				}
			}
		}
		else
		{
			synchronized(Lock.b)
			{
				System.out.println("ea");
				synchronized(Lock.a)
				{
					System.out.println("eb");
				}
			}
		}
	}
}	
class Lock
{
	static Object a=new Object();
	static Object b=new Object();
}

class Ly
{
	public static  void main(String[] args)
	{
		
		Thread t1=new Thread(new Test(true));
		Thread t2=new Thread(new Test(false));
		t1.start();
		t2.start();
		
	}
}


/*
class Ticket implements Runnable
{
	private int tick =100;
	Object obj =new Object();
	boolean flag=true;
	public void run()
	{
		if(flag)
		{
			while(true)
			{
				synchronized(this)
				{
					if(tick>0)
					{
						try
						{
							Thread.sleep(10);
						}
						catch(Exception e)
						{
							
						}
						System.out.println(Thread.currentThread().getName()+"...Rest:"+tick--);
					}
				}
			}
		}
		else 
			while(true)
				show();
	}
	public synchronized void show()
	{
		if(tick>0)
		{
			try
			{
				Thread.sleep(10);
			}
			catch(Exception e)
			{
				
			}
			System.out.println(Thread.currentThread().getName()+"...Rest:"+tick--);
		}
	}
}

class Ly
{
	public static void main(String[] args)
	{
		Ticket t=new Ticket();
		Thread t1=new Thread(t);
		Thread t2=new Thread(t);
		t1.start();
		try{Thread.sleep(10);}catch(Exception e){}
		t.flag=false;
		t2.start();
		
	}
}
*/