package thread3_2;

class TestThread {
	  public Object lock=new Object();
	    
	  public   void execute(){  
	    	 synchronized (this){   //synchronized ，，，，和 下面的 execute1() , execute3()是等效的！！鎖定的都死對象 而不是類。！！！！
			    	 for(int i=0;i<20;i++){
		        	  try {
						Thread.sleep(100);
					  } catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					  }
		               System.out.println(Thread.currentThread().getName()+Thread.currentThread().getName()+"    "+i);
			         } 
	    	 }
    }
	  public   void execute3(){  
	    	 synchronized (lock){   //synchronized ，，，，和 下面的 execute1()  , execute()是等效的！！鎖定的都死對象 而不是類。！！！！
			    	 for(int i=0;i<20;i++){
		        	  try {
						Thread.sleep(100);
					  } catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					  }
		               System.out.println(Thread.currentThread().getName()+Thread.currentThread().getName()+"    "+i);
			         } 
	    	 }
      }
	     
	  public  synchronized void execute1(){  //synchronized，，，，和上面的 execute() , execute3() 是等效的！！鎖定的都死對象 而不是類。！！！！
			    	 for(int i=0;i<20;i++){
		        	  try {
						Thread.sleep(100);
					  } catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					  }
		               System.out.println(Thread.currentThread().getName()+Thread.currentThread().getName()+"    "+i);
			         } 
    }
	 
	  

	  
}

 class ThreadA implements Runnable{
         TestThread test=null;
	    public ThreadA(TestThread pTest){  //對象有外部引入，這樣保證是同一個對象
             test=pTest;
        }
        public void run() {
            test.execute();
}
    }
public class Thread_2{
			public static void main(String[] args){
				 TestThread test=new TestThread();
				 Runnable runabble=new ThreadA(test);
				 Thread a=new Thread(runabble,"A");                
				 a.start();
				 Thread b=new Thread(runabble,"B");
				 b.start();
      }
			}