How to Pass byref in Java

[newbiejava]

Dear All,

How to Pass byref in Java like in C# codes below?

private boolean getPassByRef(int a, int b, ref int c) {
   boolean ret1 = false;
   int ret2 = 0;
   ret2 = (a * b) + 3;
   c = ret2;
   ret1 = true;
   return ret1;
}

[berkeleybross]

Java copies everything by value.
To "pass by reference" you will have to wrap primitives in an object, and pass a reference to it.

You may want to look Q&A : How do I pass a primitive data type by reference?, its a fairly simple and clear explanation in my opinion (also the first result from google)

Hope this helps,
if you need a clearer explanation just ask

Berkeleybross

[JosAH]

Dear All,

How to Pass byref in Java like in C# codes below? [ snip ]

You can't; this question boils up ever so often: Java uses the pass by value mechanism only; remember that. You could have read that in any decent Java tutorial.

kind regards,

Jos

[newbiejava]

Hi JosAh,

so how to return multiple values? ..
in my case below .. I have to return boolean and the math result?

private boolean getPassByRef(int a, int b, ref int c) {
boolean ret1 = false;
int ret2 = 0;
ret2 = (a * b) + 3;
c = ret2;
ret1 = true;
return ret1;
}

[Fubarable]

If you must return multiple types of information, one way is to create a class that holds various types and return an object of the class.