Abstract classes and interfaces in Java serve fundamentally different purposes. ... Can only use static final fields, parameters, or local variables for methods.

Difference between static and final in Java. While static variables use memory very efficiently, a static variable is not constant. It can be changed at any time. Imagine that you want a constant that ...

1. abstract method must be included in abstract class. 2. abstract class can not have instance. 3. class that include abstract method must be abstract class. 1. Var with Final could not be changed 2.

This chapter discusses instance variables, access modifiers, and encapsulation. Java methods start with an access modifier of public, private, protected, or blank (default access). This is followed by ...

Interface with default methods in java 8in later version of java interfaces always contained only method declaration. we are not giving method definition in the interfaces because java did not allow ...