Java.lang.Class.getInterfaces() Method

Description

The java.lang.Class.getInterfaces() determines the interfaces implemented by the class or interface represented by this object.

Declaration

Following is the declaration for java.lang.Class.getInterfaces() method

public Class<?>[] getInterfaces()

Parameters

• NA

Return Value

This method returns an array of interfaces implemented by this class.

Exception

• NA

Example

The following example shows the usage of java.lang.Class.getInterfaces() method.

package com.tutorialspoint;

import java.lang.*;
import java.util.*;

public class ClassDemo {

   public static void main(String[] args) {
      show(Thread.class);
   }
 
   public static void show(Class cls) {
      System.out.println("Class = " + cls.getName());
  
      Class[] c = cls.getClasses();
      System.out.println("Classes = " + Arrays.asList(c));
    
      // returns an array of interfaces
      Class[] i = cls.getInterfaces();
      System.out.println("Interfaces = " + Arrays.asList(i));
   }
} 

Let us compile and run the above program, this will produce the following result:

Class = java.lang.Thread
Classes = [interface java.lang.Thread$UncaughtExceptionHandler, class java.lang.Thread$State]
Interfaces = [interface java.lang.Runnable]