Class getInterfaces() method in Java with Examples (original) (raw)

Last Updated : 27 Jan, 2022

The getInterfaces() method of java.lang.Class class is used to get the interfaces directly implemented by this entity. This entity can be a class or an interface. The method returns an array of interfaces directly implemented by this entity.
Syntax:

public Class[] getInterfaces()

Parameter: This method does not accept any parameter.
Return Value: This method returns an array of interfaces directly implemented by this entity.
Below programs demonstrate the getInterfaces() method.
Example 1:

Java `

// Java program to demonstrate getInterfaces() method

import java.util.*;

public class Test { public static void main(String[] args) throws ClassNotFoundException {

    // returns the Class object for this class
    Class myClass = Class.forName("Test");

    System.out.println("Class represented by myClass: "
                       + myClass.toString());

    // Get the interfaces of myClass
    // using getInterfaces() method
    System.out.println(
        "Interfaces of myClass: "
        + Arrays.toString(
              myClass.getInterfaces()));
}

}

`

Output:

Class represented by myClass: class Test Interfaces of myClass: []

Example 2:

Java `

// Java program to demonstrate getInterfaces() method

import java.util.*;

interface Arr { }

public class Test implements Arr {

public static void main(String[] args)
    throws ClassNotFoundException
{
    // returns the Class object
    Class myClass = Class.forName("Test");

    // Get the interfaces of myClass
    // using getInterfaces() method
    System.out.println(
        "Interfaces of myClass: "
        + Arrays.toString(
              myClass.getInterfaces()));
}

}

`

Output:

Interfaces of myClass: [interface Arr]

Reference: https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html#getInterfaces--