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Question about variables

Ameem Shaik

Joined: May 24, 2010
Posts: 4
Hi, I need clarification about why these two scenarios produce different type of results.
When you have something like:

y=3, not 7.

However, when you have something like this:

a.size =20, not 10.

What causes this difference? I'm guessing it has to do something with the difference in primitive variables and object reference variables, but I'm not entirely sure. I'm new to both Java and programming in general, so can someone explain this to me? Thanks.

Ernest Friedman-Hill
author and iconoclast

Joined: Jul 08, 2003
Posts: 24199


Welcome to JavaRanch!

Read this and then this and I guarantee you will understand perfectly!

[Jess in Action][AskingGoodQuestions]
Jim Hoglund
Ranch Hand

Joined: Jan 09, 2008
Posts: 525
Hi Ameem : Welcome to the ranch. With just a quick look you'll see
that you created just one object with new, but with two reference
variables for it. So you can use either variable to change the object's
state or to look at it.

Jim ... ...

Ameem Shaik

Joined: May 24, 2010
Posts: 4
Thank you both for the help! It is now clear to me.
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subject: Question about variables
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