Question

I have this very long exercise and I came a cross a problem in each sub class.
The problem says and I have no idea what mistake I’ve made while writing.
If you could check the 4 toString methods I would be much apprecaited .

The code is here: http://paste.org/pastebin/view/39488
I know I should past the code here but it is very long and I’m not able to organize it well.

toString() in Shape cannot override toString() in java.lang.Object; attempting to use incompatible return type

toString() in Square cannot override toString() in java.lang.Object; attempting to use incompatible return type
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toString() in Sphere cannot override toString() in java.lang.Object; attempting to use incompatible return type

toString() in Cube cannot override toString() in java.lang.Object; attempting to use incompatible return type

thanks

Answer 1

You need to change the return type of the function to String and return the text instead of writing it to System.out.

public String toString() {
    return  "(" + super.getX() + ", " +
    super.getY() +") " + "side: " + super.getDimension1();
}

EDIT: If you want to have a method that outputs the object directly to System.out in textual form, you’ll need to call it something else than toString(). This is because toString() is a method belonging to java.lang.Object which all Java classes automatically extend.