Explain the interface keyword in Java.

Title: Navigating Java's Interface Keyword: A Comprehensive Guide - Insights from an UrbanPro.com Java Tutor

Introduction

Dive into the intricacies of Java's "interface" keyword, a powerful construct that promotes code organization and flexibility. As an experienced Java Tutor on UrbanPro.com, I'll guide you through the concept of interfaces in Java, shedding light on its significance in computer programming.

1. Understanding the Interface Keyword in Java

Gain insights into the purpose and functionality of the "interface" keyword:

• Definition: In Java, an interface is a collection of abstract methods. It defines a contract that classes must adhere to.

• Abstract Methods: Interfaces can only contain abstract methods (methods without a body), leaving the implementation to the classes that implement the interface.

2. Key Characteristics of Interfaces

Explore the essential characteristics that define Java interfaces:

1. Abstraction:

• Pure Abstraction: Interfaces provide a level of abstraction by declaring methods without specifying their implementation.

• Hide Implementation Details: Classes implementing an interface must provide the concrete implementation, allowing the hiding of internal details.

2. Multiple Inheritance:

• Achieving Multiple Inheritance: Unlike classes, a Java class can implement multiple interfaces.

• Addressing Diamond Problem: Interfaces address the diamond problem associated with multiple inheritance in class-based languages.

3. Constants (Static Final Variables):

• Defining Constants: Interfaces can include constants, which are implicitly public, static, and final.

• Accessing Constants: Classes implementing the interface can access these constants directly.

3. Declaring and Implementing Interfaces

Understand the syntax and implementation of interfaces in Java:

1. Declaring an Interface: