Inheritance - Learneroo

Difference Between extends and implements keywords in Java (with Comparison chart) - Tech Differences

java - Implements vs extends: When to use? What's the difference

The representation of an Ink class in Java

Inheritance in Java - Shiksha Online

Java Inheritance - Shape class with a method called getArea

Inheritance in Java – Quick Overview

Extending Java Classes Using proxy - Getting Clojure

multiple inheritances in java & How to achieve it - JavaGoal

Difference between Abstract Class and Interface in Java

Map in Java: All About Map Interface in Java