JAVA: return methods and setting parameters

Question

I am new to java, how does returning value work? I need to return the width of an GLabel, to use it in another method

private double createLabel(String text, int locX, int locY){
    double widthOfLabel = labelText.getWidth();
    return widthOfLabel;
}

(I've cut out the un=important parts) but this should return the width of the label.

how do i use it within another method?

private void  getWidthofLabel(){
    double name = ?????????
}

I tried some different stuff, but they all seem to just return null. One more thing when I get the return value of the createLabel method, do I have to set it´s parameters (string,int,int)? I don´t want that, but the debugger seems to force me to set them.

Tudor · Accepted Answer · 2012-09-02 10:19:49Z

1

If you want to get the result of createLabel you will need something like:

double name = createLabel(text, locX, locY);

You will have to provide the parameters, otherwise you cannot compile the code. If you don't need them you can create an overload with no parameters:

private double createLabel(){
      double widthOfLabel = labelText.getWidth();
      return widthOfLabel;
}

but at this point I'm not sure what's going on in your code. :D

answered Sep 2, 2012 at 10:19

Tudor

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Bharat Sinha · Accepted Answer · 2012-09-02 10:21:02Z

1

The return call will be done like:

double name =  createLabel(text, locX, locY);

and if you define method like following:

private double createLabel(String text, int locX, int locY){
}

You would need to pass a String and two int. In case you want a variant where you need not to pass parameters; overload the method like:

private double createLabel(){
}

which you can call like:

double name =  createLabel();

answered Sep 2, 2012 at 10:21

Bharat Sinha

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LeeNeverGup · Accepted Answer · 2012-09-02 10:22:21Z

0

You need to call the function:

double name = createLabel(text,locX,lockY);

where text is a string, locX and lockY is ints.
it is impossible to call a function without its parameters, unless there is another function with the same name (that's called overload method).

answered Sep 2, 2012 at 10:22

LeeNeverGup

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1 Comment

Tudor Over a year ago

A function with the same name but different parameters is called an overload, not override.

mssb · Accepted Answer · 2012-09-02 11:59:06Z

0

you can call like this

private void  getWidthofLabel(){
   double name = createLabel("label", 3, 5);
}

answered Sep 2, 2012 at 11:59

mssb

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