What is an interface in Java?
Interface in java is a core part of the Java programming language and one of the ways to achieve abstraction in Java along with the abstract class. Even though the interface is a fundamental object-oriented concept; Many Java programmers think of Interface in Java as an advanced concept and refrain from using the interface from early in a programming career. At a very basic level interface in java is a keyword but same time it is an object-oriented term to define contracts and abstraction, This contract is followed by any implementation of Interface in Java. Since multiple inheritances are not allowed in Java, the interface is the only way to implement multiple inheritances at the Type level.
Interface in java is a core part of the Java programming language and one of the ways to achieve abstraction in Java along with the abstract class. Even though the interface is a fundamental object-oriented concept; Many Java programmers think of Interface in Java as an advanced concept and refrain from using the interface from early in a programming career. At a very basic level interface in java is a keyword but same time it is an object-oriented term to define contracts and abstraction, This contract is followed by any implementation of Interface in Java. Since multiple inheritances are not allowed in Java, the interface is the only way to implement multiple inheritances at the Type level.