package Chapter3;
public class Assignment {
	public static void main(String Args[]){
		Tank t1=new Tank();
		t1.a=1;
		Tank t2=new Tank();
		t2.a=2;
		t1=t2;
		System.out.println(t1.a);
		System.out.println(t2.a);
	}
}

class Tank{
	int a;
}
/*
 *結(jié)果是2
 *    2
 *這是Java里邊的別名機(jī)制，也就是說，對(duì)對(duì)像c,和d進(jìn)行c=d操作時(shí)，實(shí)際上是讓對(duì)象c也指向?qū)ο骴的引用
 * 
 */