Implements vs extends: When to use? What’s the difference?
This question already has answers here: What does ‘super’ do in Python? – difference between super().__init__() and explicit superclass __init__() (11 answers) Closed 6 years ago. Why is super()...
You need to create a new Triangle object like this, so that you have a reference Trangle triangle = new Triangle(side1, side2, side3); // ^^^^^^ This is the most important thing...
How to determine an object’s class?
Why is there no multiple inheritance in Java, but implementing multiple interfaces is allowed?