package 线程安全的讨论;class DThread implements Runnable{    private Object o1=null;    private Object o2=null;    public DThread(Object o1,Object o2)    {        this.o1=o1;        this.o2=o2;    }    @Override    public void run() {        // TODO Auto-generated method stub              synchronized(o1)              {                  try {                    Thread.sleep(1000);                } catch (InterruptedException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }                  synchronized(o2)                  {                      System.out.println("突破两道防线，进来啊，哈哈"+Thread.currentThread().getId());                  }                                                  }    }            }public class DeadLockTest {    public static void main(String args[])    {        System.out.println("死锁检测");        Object o1=new Object();        Object o2=new Object();        //开启10个线程，按照1，2获得锁。        for(int i=0;i<100;i++)        {            new Thread(new DThread(o1,o2)).start();;        }        //按照1,0获得锁        for(int i=0;i<100;i++)        {            new Thread(new DThread(o2,o1)).start();;        }        for(int i=0;i<100;i++)        {            new Thread(new DThread(o1,o2)).start();;        }                    }}