What Is The Difference Between Interface And Class In Java
Understanding the Difference Between Interface and Class in Java
What Is The Difference Between Interface And Class In Java
In Java, an interface is a collection of abstract methods that must be implemented by any class that wants to adhere to that interface. Interfaces provide a blueprint for classes to follow, specifying what methods should be included without defining how they should be implemented. On the other hand, a class in Java is a blueprint for creating objects that define both attributes and behaviors. An interface is a way to achieve abstraction and multiple inheritances in Java, while a class is a more concrete implementation that can be instantiated to create objects.
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1 - In Java, an interface is a blueprint of a class that defines a set of abstract methods that must be implemented by any class that implements the interface. On the other hand, a class is a blueprint for creating objects that can have attributes and methods associated with them.
2) Interfaces can only contain abstract methods and constants, while classes can have both abstract and concrete methods along with fields and constructors.
3) A class can only extend one class, but it can implement multiple interfaces in Java.
4) Interfaces are used to achieve abstraction and multiple inheritance in Java, providing flexibility in designing software systems.
5) In Java, an interface is considered a contract that a class can sign up for by implementing it, ensuring that the class provides specific behavior as defined in the interface.
6) Classes can have access specifiers like public, private, protected, and default, while interface methods are public by default.
7) Interfaces are often used to define behaviors that can be shared by multiple classes, promoting code reusability and modularity in software development.
8) Classes can have instance variables (fields) that store the state of an object, while interfaces cannot have instance variables.
9) Interfaces are more flexible and can be added to existing classes without modifying their hierarchical structure, making it easier to extend and expand code functionality.
10) In Java, classes are used to create objects with specific behavior and attributes, while interfaces are used to enforce a contract for classes to implement specific methods.
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