Java死锁

死锁

死锁就好比伊邪那美，轮回吧！！！！

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解除轮回，就跳出了死锁。

public class Test{
	public static void main(String[] args) {
		DeadLockRunnable d1 = new DeadLockRunnable();
		d1.flag = 1;
		DeadLockRunnable d2 = new DeadLockRunnable();
		d2.flag = 2;
		new Thread(d1,"张三").start();
		//常用线程休眠来有效的解决死锁问题，释放下面代码，则能解决本例死锁问题。
//		try {
//			Thread.sleep(100);
//		} catch (InterruptedException e) {
//			// TODO Auto-generated catch block
//			e.printStackTrace();
//		}		
		new Thread(d2,"李四").start();
	}
}

class DeadLockRunnable implements Runnable{
	public int flag;
	private static Object o1 = new Object();
	private static Object o2 = new Object();
	@Override
	public void run() {
		// TODO Auto-generated method stub
		if(flag ==1) {
			System.out.println(Thread.currentThread().getName() + "获取了资源o1,等待获取资源o2");
			synchronized(o1){
				try {
					Thread.currentThread().sleep(100);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				synchronized(o2) {
					System.out.println(Thread.currentThread().getName() + "执行完毕");
				}
			}
		}
		if(flag ==2) {
			System.out.println(Thread.currentThread().getName() + "获取了资源o2,等待获取资源o1");
			synchronized(o2){
				try {
					Thread.currentThread().sleep(100);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				synchronized(o1) {
					System.out.println(Thread.currentThread().getName() + "执行完毕");
				}
			}
		}
	}
	
}

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