一个Java死锁示例

没什么说的，都在注释里了：

public class DeadLock {

	public static void main(String[] args) {
		//o1 o2 代表资源
		Object o1 = new Object();
		Object o2 = new Object(); 
		
		System.out.println("go go go!");
		Thread t1 = new Thread(new Runnable() {
			public void run() {
				synchronized (o1) {   //线程t1获取o1的锁才能继续执行
					try {
						Thread.sleep(3000);      //睡3秒，确保线程t2把o2锁拿走
					} catch (InterruptedException e) {
						e.printStackTrace();
					}
					System.out.println("t1获得了哦O1");
					synchronized (o2) {                 //线程t1获取o2的锁才能继续执行
						System.out.println("t1获得了哦O2");
					}
				}
			}
		});
		
		Thread t2 = new Thread(new Runnable() {
			public void run() {
				synchronized (o2) {  //线程t2获取o2的锁才能继续执行
					try {
						Thread.sleep(3000);     //睡3秒，确保线程t1把o1锁拿走
					} catch (InterruptedException e) {
						e.printStackTrace();
					}
					System.out.println("t2获得了哦O2");
					synchronized (o1) {             //线程t2获取o1的锁才能继续执行
						System.out.println("t2获得了哦O1");
					}
				}
			}
		});
		
		t1.start();
		t2.start();       //启动线程
	}

}

输出：go go go!

          t1获得了o1

          t2获得了o2

可以发现，程序永远也执行不完了