关于死锁

Question

如何实现两个线程下的死锁现象？

Answer 1

[code="java"]
package com.lance.web;

public class TestThread {
public static Object Lock1 = new Object();
public static Object Lock2 = new Object();

public static void main(String args[]) {

    ThreadDemo1 T1 = new ThreadDemo1();
    ThreadDemo2 T2 = new ThreadDemo2();
    T1.start();
    T2.start();
}

private static class ThreadDemo1 extends Thread {
    public void run() {
        synchronized (Lock1) {
            System.out.println("Thread 1: Holding lock 1...");
            try {
                Thread.sleep(10);
            } catch (InterruptedException e) {
            }
            System.out.println("Thread 1: Waiting for lock 2...");
            synchronized (Lock2) {
                System.out.println("Thread 1: Holding lock 1 & 2...");
            }
        }
    }
}

private static class ThreadDemo2 extends Thread {
    public void run() {
        synchronized (Lock2) {
            System.out.println("Thread 2: Holding lock 2...");
            try {
                Thread.sleep(10);
            } catch (InterruptedException e) {
            }
            System.out.println("Thread 2: Waiting for lock 1...");
            synchronized (Lock1) {
                System.out.println("Thread 2: Holding lock 1 & 2...");
            }
        }
    }
}

}
[/code]