线程死锁-死锁产生演练thread,java,多线程yb创作中心-

代码演练demo：

package cn.yb.thread; public class DeadLockRunnable implements Runnable { private int flag;//决定线程走向的标记 private static Object obj1 = new Object();//锁对象1 private static Object obj2 = new Object();//锁对象2 public DeadLockRunnable(int flag) { this.flag = flag; } public void run() { if(flag == 1){ //线程1执行代码  synchronized (obj1) {    System.out.println(Thread.currentThread().getName()+"已经获取到资源obj1,请求obj2"); try {     Thread.sleep(1000); } catch (InterruptedException e) {     e.printStackTrace(); } synchronized (obj2) {     System.out.println(Thread.currentThread().getName()+"已经获取到obj1和obj2"); } } }else { //线程2执行代码  synchronized (obj2) {      System.out.println(Thread.currentThread().getName()+"已经获取到资源obj2,请求obj1"); try {       Thread.sleep(1000); } catch (InterruptedException e) {       e.printStackTrace(); } synchronized (obj1) {       System.out.println(Thread.currentThread().getName()+"已经获取到obj1和obj2"); } } } } } 

测试类：

package cn.yb.thread; public class DeadLockDemo { public static void main(String[] args) { //1.创建两个DeadLockRunnable实例:flag = 1;flag = 2   DeadLockRunnable runnable1 = new DeadLockRunnable(1);   DeadLockRunnable runnable2 = new DeadLockRunnable(2); //2.创建两个线程执行两个DeadLockRunnable   Thread thread1 = new Thread(runnable1,"runnable1");   Thread thread2 = new Thread(runnable2,"runnable2");   thread1.start();   thread2.start(); } } 

运行结果：