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();;
}
}
}
