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passing objects

Posted on 2012-03-14
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Last Modified: 2012-03-14
If I instantiate an object in my application's main class, and then pass it to the constructor of another class which will need to use it, does the copy/assignment of the object to something local actually make another object?
Generic example below:
Class A {
ClassB B = new ClassB();
ClassC C = new ClassC(B);
}

Class C {
ClassB localB = null;
Class C (ClassB B) {
  localB = B;
}
}
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Question by:dpalyca755
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by:
nareshvoota earned 2000 total points
ID: 37723038
Java is always pass by value but when you pass a reference to a method, the reference gets copied over. But it still points to the old object.

Please read this discussion in stackoverflow

http://stackoverflow.com/questions/40480/is-java-pass-by-reference

In your case,  localB is referring to the new class B object that is made in class A.

Hope this helps.
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