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Java Tutorials - Extending an Interface in java

uml - Can a class extend an abstract class and implement an interface at the same time? (java) - Stack Overflow

Java – Inheritance – Connect2Compute

java - How to extend or implement classes? - Stack Overflow

The representation of an Ink class in Java

Java Generics — Advanced Cases - DEV Community

Java Interfaces Tutorial (create, implement, and extend)

Solved Which of the following is a correct EBNF description

Extending Java Classes Using proxy - Getting Clojure

implements vs extends