代码如下：

/**
 * 死锁
 *
 */
public class DeadThread {

    private static Object obj1 = new Object();
    private static Object obj2 = new Object();
    
    public static void main(String[] args) {
        Thread t1 = new Thread(){
            public void run(){
                synchronized(obj1){
                    System.out.println(this.getName() + "=====obj1");
                    
                    synchronized(obj2){
                        System.out.println(this.getName() + "=====obj2");
                    }
                }
            }
        };
        
        Thread t2 = new Thread(){
            public void run(){
                synchronized(obj2){
                    System.out.println(this.getName() + "=====obj2");
                    
                    synchronized(obj1){
                        System.out.println(this.getName() + "=====obj1");
                    }
                }
            }
        };
        
        t1.start();
        t2.start();
    }

}

此时就会发生死锁