ThreadDeath 理解

 public class RunnableTest2 {
     public static Object obj1 = new Object();
     public static Object obj2 = new Object();
     private MyThread1 t1 = new MyThread1();
     private MyThread2 t2 = new MyThread2();
     public static void main(String[] args) {
         RunnableTest2 tr = new RunnableTest2();
         tr.t1.start();
         tr.t2.start();
     }
 }

 class MyThread1 extends Thread {
     @Override
     public void run() {
         System.out.println(Thread.currentThread()+"锁定了obj1，过2秒锁定obj2去");
         synchronized (RunnableTest2.obj1) {
             try {
                 Thread.sleep(2000);
                 synchronized (RunnableTest2.obj2) {
                     System.out.println("1");
                 }
             } catch (InterruptedException e) {
                 e.printStackTrace();
             }
         }
     }
 }

 class MyThread2 extends Thread {
     @Override
     public void run() {
             System.out.println(Thread.currentThread()+"锁定了obj2，过2秒锁定obj1去");
             synchronized (RunnableTest2.obj2) {

                 try {
                     Thread.sleep(2000);
                     synchronized (RunnableTest2.obj1) {
                         System.out.println("2");
                     }
                 } catch (InterruptedException e) {
                     // TODO Auto-generated catch block
                     e.printStackTrace();
                 }

             }
     }
 }

打印结果：

Thread[Thread-0,5,main]锁定了obj1，过2秒锁定obj2去
Thread[Thread-1,5,main]锁定了obj2，过2秒锁定obj1去