线程死锁演示，线程锁演示,模拟JVM的线程次序调度
模拟JVM的线程次序调度
注释A，不注释B，一般不死锁
注释B，不注释A，死锁
都不注释，随机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(); }}//该片段来自于http://byrx.net
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