Java Abstraction
javaIn Java, abstraction is a technique for hiding the implementation details of a class and exposing only the necessary functionality to the users of the class. It allows you to create a simplified interface for a complex system and separates the interface from the implementation, so that the implementation can be changed without affecting the users of the interface.
There are two main ways to implement abstraction in Java: abstract classes and interfaces.
An abstract class is a class that contains one or more abstract methods, which are methods that do not have an implementation and must be implemented by any concrete (non-abstract) subclass of the abstract class. An abstract class can also contain concrete (non-abstract) methods, which do have an implementation.
Here’s an example of an abstract class in Java:
abstract class Animal {
public abstract void makeSound();
public void eat() {
System.out.println("Eating...");
}
}
In this example, the Animal
class is an abstract class that contains an abstract method called makeSound()
and a
concrete method called eat()
. Any concrete subclass of the Animal
class must implement the makeSound()
method, but
can
use the implementation of the eat()
method provided in the Animal
class.
An interface is a collection of abstract methods that define a set of behaviors that a class must implement. A class can implement multiple interfaces, but it can only extend one superclass.
Here’s an example of an interface in Java:
interface Animal {
void makeSound();
void eat();
}
class Cat implements Animal {
@Override
public void makeSound() {
System.out.println("Meow");
}
@Override
public void eat() {
System.out.println("Eating...");
}
}
In this example, the Animal
interface defines the makeSound()
and eat()
methods that a class must implement.
The Cat
class implements the Animal
interface and provides implementations for the makeSound()
and eat()
methods.
![](/image/facebook_icon.png)
![](/image/twitter_icon.png)
Other Article on Tag java
- - after and before in java date
- - am pm java date format
- - apk minecraft java edition
- - as been blocked by CORS policy Response to preflight request doesn't pass access control check It does not have HTTP ok status
- - bubble sort in java
- - Can I compile and run a spring boot jar from inside another spring boot application
- - convert java date to localdate
- - design patterns in java
- - encrypt by java and decrypt by node
- - exception handling in java