Can you implement a class in Java?

Explanation: Object class is superclass of every class in Java.

The implements keyword is used to implement an interface . The interface keyword is used to declare a special type of class that only contains abstract methods. To access the interface methods, the interface must be “implemented” (kinda like inherited) by another class with the implements keyword (instead of extends ).

Some examples of concrete classes from the JDK are HashMap, HashSet, ArrayList, and LinkedList .

A class is a type of a data type . It allows you to declare a variable along with its datatype.