Java is Pass-by-Value Java都是值传递，

Java is Pass-by-Value Java都是值传递，

in C and JAVA, arguments are passed by value. 

http://javadude.com/articles/passbyvalue.htm 

http://www.javaworld.com/javaworld/javaqa/2000-05/03-qa-0526-pass.html 

http://www.yoda.arachsys.com/java/passing.html 

http://www.javaranch.com/campfire/StoryPassBy.jsp 


http://www.blogjava.net/qujinlong123/archive/2007/04/16/111060.html 

http://www.cnblogs.com/seanps/archive/2009/02/11/1388077.html 


example： 
Java代码  

1. public class TestStringBuffer {    
2.     
3.     public static void main(String[] args) {    
4.         
5.         StringBuffer a=new StringBuffer("A");    
6.         StringBuffer b=new StringBuffer("B");    
7.         method(a,b);    
8.         System.out.println(a+","+b);    
9.     }    
10.     public static void method(StringBuffer x,StringBuffer y){           
11.         x.append(y);     
12.         y=x;    
13.     }    
14. }    

out：AB,B 
析(设存放有A的StringBuffer对象分配在地址为0x1的堆空间，存放有B的StringBuffer对象分配在地址为0x2的堆空间)：