How do I check if a class represent an interface type?

You can use the isInterface() method call of the java.lang.Class to identify if a class objects represent an interface type.

package org.kodejava.lang.reflect;


public class IsInterfaceDemo {
    public static void main(String[] args) {

    private static void get(Class<?> clazz) {
        if (clazz.isInterface()) {
            System.out.println(clazz.getName() +
                    " is an interface type.");
        } else {
            System.out.println(clazz.getName() +
                    " is not an interface type.");

Here is the result of the program: is an interface type.
java.lang.Long is not an interface type.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.