Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
List the Interfaces That a Class Implements in Java
The interfaces that are implemented by a class that is represented by an object can be determined using the java.lang.Class.getInterfaces() method. This method returns an array of all the interfaces that are implemented by the class.
A program that demonstrates this is given as follows −
Example
package Test;
import java.lang.*;
import java.util.*;
public class Demo {
public static void main(String[] args) {
listInterfaces(String.class);
}
public static void listInterfaces(Class c) {
System.out.println("The Class is: " + c.getName());
Class[] interfaces = c.getInterfaces();
System.out.println("The Interfaces are: " + Arrays.asList(interfaces));
}
}Output
The Class is: java.lang.String The Interfaces are: [interface java.io.Serializable, interface java.lang.Comparable, interface java.lang.CharSequence]
Now let us understand the above program.
The method listInterfaces() is called with String.class in the method main(). A code snippet which demonstrates this is as follows −
listInterfaces(String.class);
In the method listInterfaces(), the method getName() is used to print the name of the class. Then the method getInterfaces() is used to return an array of all the interfaces that are implemented by the class. Then this array is printed using Arrays.asList(). A code snippet which demonstrates this is as follows −
System.out.println("The Class is: " + c.getName());
Class[] interfaces = c.getInterfaces();
System.out.println("The Interfaces are: " + Arrays.asList(interfaces));
503 Views
