QuestionsJavaWhy we use interface in Java?

Why we use interface in Java?

Interface In Java is a collection of abstract methods, which are methods without any implementation. It is essentially a contract that specifies the behavior that a class must provide, but it doesn’t provide any details about how that behavior should be implemented.

The main reason for using interfaces in Java is to achieve abstraction and decoupling. By programming to an interface rather than a concrete implementation, you can write more flexible, reusable and maintainable code.

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Here are some of the benefits of using interface in Java:

1. Abstraction

Interfaces provide a way to define a set of behaviors that a class must implement, without specifying how those behaviors should be implemented. This allows you to create more generic and reusable code.

2. Decoupling

Interfaces help to reduce dependencies between classes, because they define a contract between them. This makes it easier to make changes to one class without affecting others.

3. Polymorphism

Interfaces allow you to write code that works with objects of different classes that implement the same interface. This is known as polymorphism, and it can help to make your code more flexible and extensible.

4. Multiple Inheritance

Java doesn’t support multiple inheritance, but a class can implement multiple interfaces. This allows you to combine behaviors from different sources.

In summary, interfaces are an essential feature of Java that allows you to write more modular, flexible, and reusable code.

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