java:對象賦值

標籤：

 1 package exercise; 2  3 class Tank 4 { 5     int level; 6 } 7  8 public class Assignment{ 9     public static void main(String[]args){10         Tank t1=new Tank();11         Tank t2=new Tank();12         13         t1.level=9;14         t2.level=47;15         16         System.out.println("t1.level:"+t1.level+",t2.level:"+t2.level);17         18         t1=t2;19         System.out.println("t1.level:"+t1.level+",t2.level:"+t2.level);20         //when you assign "from one object to another" ,your are actually copying a reference21         //from one place to another.22         //this means that if you say c=d for objects,you end up with both c and d pointing to23         //the object that, originally,only d pointed to .24         25         t1.level=27;26         System.out.println("t1.level:"+t1.level+",t2.level:"+t2.level);27     }28 }

輸出

1 t1.level:9,t2.level:472 t1.level:47,t2.level:473 t1.level:27,t2.level:27

 

java:對象賦值