package org.he.bin;
/**
 * @author BenHe 
 * @email qing878@gmail.com
 * @for description dead lock
 */
public class DeadLock extends Thread {
    private boolean threadFlag;
    private Object lock1 ;
    private Object lock2 ;
    public DeadLock(boolean threadFlag,Object lock1,Object lock2) {
        this.threadFlag = threadFlag;
        this.lock1=lock1;
        this.lock2=lock2;
    }

    @Override
    public void run() {
        try {
            if (threadFlag)
                methodA();
            else
                methodB();
        } catch (InterruptedException e) {
            System.out.println(e.getMessage());
        }
    }

    void methodA() throws InterruptedException {
        synchronized (lock2) {
            Thread.sleep(10); // point A
            System.out.println(this.getName()+":lock lock2");
            System.out.println(this.getName()+":wait for lock1");
            synchronized (lock1) {
                System.out.println(this.getName()+":in methodA");
            }
        }
    }

    void methodB() throws InterruptedException {
//      Thread.sleep(10);  //point B
        synchronized (lock1) {
            System.out.println(this.getName()+":lock lock1");
            System.out.println(this.getName()+":wait for lock2");
            synchronized (lock2) {
                System.out.println(this.getName()+":in methodB");
            }
        }
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        Object lock1 = new Object();
        Object lock2 = new Object();
        new DeadLock(true,lock1,lock2).start();
        new DeadLock(false,lock1,lock2).start();
    }

}

//源代码片段来自云代码http://yuncode.net