difference between java class and interface

certainly! in java, both classes and interfaces are fundamental constructs used to create objects and define behaviors. however, they serve different purposes and have distinct characteristics. let's explore the differences between classes and interfaces in java, along with code examples for better understanding.

java class

1. **definition**: a class is a blueprint for creating objects. it can contain fields (attributes) and methods (functions).

2. **implementation**: a class can provide the implementation of its methods.

3. **inheritance**: a class can inherit from another class (single inheritance) and can also implement multiple interfaces.

4. **instantiation**: you can create instances (objects) of a class using the `new` keyword.

5. **access modifiers**: classes can have various access modifiers (public, private, protected, and package-private).

6. **constructors**: classes can have constructors to initialize objects.

java interface

1. **definition**: an interface is a reference type in java that is similar to a class but can only contain method signatures (without the implementation) and constants (static final variables).

2. **implementation**: interfaces do not provide any implementation for their methods (at least until java 8, which introduced default and static methods).

3. **inheritance**: a class can implement multiple interfaces, allowing for multiple inheritance of type.

4. **instantiation**: you cannot create an instance of an interface directly.

5. **access modifiers**: all methods in an interface are implicitly public and abstract (unless they're default or static methods).

6. **no constructors**: interfaces cannot have constructors.

key differences

| feature | class | interface |
|----------------------|----------------------------------------|-------------------------------------|
| can contain fields | yes | no (only s ...

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