Question

Does some interface like below already exist in Java?

interface Size {
    int getWidth();
    int getHeight();
}

Edit: It must be an interface.

Answer 1

I’d recommend making your own rather than using java.awt.Dimension, particularly if what you want is an interface and not a class. If you do want a class like Dimension, I still wouldn’t use it, but instead make another class as an immutable value type… Dimension‘s mutability is a major weakness. Every method that returns a Dimension is forced to return a copy of it, and every method that accepts a Dimension is forced to make a copy of it too. Had it been immutable, copying wouldn’t have been required in either case.