Class getInterfaces() method in Java with Examples

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<T>[] 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–