

- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Can an interface in Java extend multiple interfaces?
An interface in Java is similar to class but, it contains only abstract methods and fields which are final and static. Just like classes you can extend one interface from another using the extends keyword as shown below:
interface ArithmeticCalculations { public abstract int addition(int a, int b); public abstract int subtraction(int a, int b); } interface MathCalculations extends ArithmeticCalculations { public abstract double squareRoot(int a); public abstract double powerOf(int a, int b); }
In the same way you can extend multiple interfaces from an interface using the extends keyword, by separating the interfaces using comma (,) as −
interface MyInterface extends ArithmeticCalculations, MathCalculations {
Example
Following is the Java program demonstrating, how to extend multiple interfaces from a single interface.
import java.util.Scanner; interface ArithmeticCalculations { public abstract int addition(int a, int b); public abstract int subtraction(int a, int b); } interface MathCalculations { public abstract double squareRoot(int a); public abstract double powerOf(int a, int b); } interface MyInterface extends MathCalculations, ArithmeticCalculations { public void displayResults(); } public class ExtendingInterfaceExample implements MyInterface { public int addition(int a, int b) { return a+b; } public int subtraction(int a, int b) { return a-b; } public double squareRoot(int a) { return Math.sqrt(a); } public double powerOf(int a, int b) { return Math.pow(a, b); } public void displayResults() { Scanner sc = new Scanner(System.in); System.out.println("Enter the value of a: "); int a = sc.nextInt(); System.out.println("Enter the value of b: "); int b = sc.nextInt(); ExtendingInterfaceExample obj = new ExtendingInterfaceExample(); System.out.println("Result of addition: "+obj.addition(a, b)); System.out.println("Result of subtraction: "+obj.subtraction(a, b)); System.out.println("Square root of "+a+" is: "+obj.squareRoot(a)); System.out.println(a+"^"+b+" value is: "+obj.powerOf(a, b)); } public static void main(String args[]) { new ExtendingInterfaceExample().displayResults(); } }
Output
Enter the value of a: 4 Enter the value of b: 3 Result of addition: 7 Result of subtraction: 1 Square root of 4 is: 2.0 4^3 value is: 64.0
- Related Questions & Answers
- Can an interface extend multiple interfaces in Java?
- Can we extend interfaces in Java? Explain?
- How to extend Interfaces in Java
- List the Interfaces that an Interface Extends in Java
- Can we extend an enum in Java?
- How we can extend multiple Python classes in inheritance?
- How to inherit multiple interfaces in Java?
- Can Enum implements an interface in Java?
- Can we declare an interface with in another interface in java?
- Can Enum extend any class in java?
- Can interfaces have constructors in Java?
- Multiple inheritance by Interface in Java
- Can we create an object for an interface in java?
- How multiple inheritance is implemented using interfaces in Java?
- Can interfaces have Static methods in Java?
Advertisements