GeeCON Prague 2014*
The moose likes Beginning Java and the fly likes Doubt in Parameter Passing Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


JavaRanch » Java Forums » Java » Beginning Java
Bookmark "Doubt in Parameter Passing" Watch "Doubt in Parameter Passing" New topic
Author

Doubt in Parameter Passing

Suresh Rajadurai
Ranch Hand

Joined: Feb 22, 2007
Posts: 58
Hi Folks,

Please note the following program:


It is giving the following output:

S1 Before Append : Hello
S1 After Append : Hello How are you
S1 After S1=S2 : Doing
Final Output in Main Method : Hello How Are you.

Could you please explain me why it is NOT printing "Doing" in the last output (it has been changed to "doing" in the method myBuf() ?
In the statement "s1=s2", if s1 and s2 are local to the method myBuf(),
then why in the statement s1.append("how are you") , s1 is not local to the method myBuff().

I am a bit confused. A good explanation is GREATLY APPRECIATED.

Thanks in advance

Best Regards

Suresh
James Tharakan
Ranch Hand

Joined: Aug 29, 2008
Posts: 580

s1=s2; in the method is modifing the reference of s1 which is created in the method and that s1 is not same as the reference in the main method


SCJP 6
Why to worry about things in which we dont have control, Why to worry about things in which we have control ! !
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 39053
    
  23
We have an FAQ which may help.
 
GeeCON Prague 2014
 
subject: Doubt in Parameter Passing