Java死锁代码实例及产生死锁必备的四个条件

public class DeadLock {
		public static void main(String[] args) {
			Object o1 = new Object();
			Object o2 = new Object();
			// t1和t2两个线程共享o1,o2
			Thread t1 = new MyThread1(o1,o2);
			Thread t2 = new MyThread2(o1,o2);
			t1.start();
			t2.start();
		}
	}
	class MyThread1 extends Thread{
		Object o1;
		Object o2;
		public MyThread1(Object o1,Object o2){
			this.o1 = o1;
			this.o2 = o2;
		}
		public void run(){
			synchronized (o1){
				try {
					Thread.sleep(1000);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
				synchronized (o2){
				}
			}
		}
	}
	class MyThread2 extends Thread {
		Object o1;
		Object o2;
		public MyThread2(Object o1,Object o2){
			this.o1 = o1;
			this.o2 = o2;
		}
		public void run(){
			synchronized (o2){
				try {
					Thread.sleep(1000);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
				synchronized (o1){
				}
			}
		}
}