File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Programmer Certification (SCJP/OCPJP) and the fly likes output Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Certification » Programmer Certification (SCJP/OCPJP)
Bookmark "output" Watch "output" New topic


sumaraghavi ragha
Ranch Hand

Joined: Nov 17, 2006
Posts: 118
why the value y is 2 hear?
why can't it is 1 becauese the vale of x is 1 in the 1st time

then it is 3 so the value of y is not incermented so the output should be

8 1

why it is 8 2please expalin me

Thanks in advance

class Foozit {
public static void main(String[] args) {
Integer x = 0;
Integer y = 0;
for(Short z = 0; z < 5; z++)
if((++x > 2) || (++y > 2))
System.out.println(x + " " + y);
Noam Wolf
Ranch Hand

Joined: Jan 12, 2008
Posts: 35
Hi sumaraghavi,

First of all I believe you're supposed to quote your sources (I believe this is from K&B).

Second the value of x is incremented twice in the for loop IF ++x>2 or ++y>2, once AFTER the "if" condition has executed and then once more after x++ has executed.

So let's look at the results for x, y, and z after each iteration of the for loop.

iteration z x x++ y
1 0 1 (1 not >2) no call 1
2 1 2 (2 not >2) no call 2
3 2 3 (3 is >2) 4 (call) 2 (no change)
4 3 5 (5 is >2) 6 (call) 2 (no change)
5 4 7 (7 is >2) 8 (call) 2 (no change)
6 5 - not less than 5 for loop ends.

I think what you're missing here is that the value of x does NOT get incremented twice for the first 2 iterations because both cases of the if block are not true and therefore x++ is not reached.

I hope that helps.

because .net guys can also write in java
Deepak Bala

Joined: Feb 24, 2006
Posts: 6662

sumaraghavi please try to use different and more meaningful subject lines as it may confuse those who want to reply to your posts. For example the following post looked like a double post because you used the same heading

Good luck with your preparation for the SCJP

SCJP 6 articles - SCJP 5/6 mock exams - More SCJP Mocks
sumaraghavi ragha
Ranch Hand

Joined: Nov 17, 2006
Posts: 118
Thanks lot.I will most more clearly from next one
I agree. Here's the link:
subject: output
It's not a secret anymore!