Java Class getInterfaces() Method

The getInterfaces() method of java Class class returns the interfaces directly implemented by the class or the interface represented by the current object.

Syntax

Parameter

No parameter is passed.

Returns

An array of interfaces.

Throws

Does not throw an exception.

Example 1

//import statements
  
import java.lang.*;
import java.util.*;

public class ClassgetInterfacesExample1 {

   public static void main(String[] args) {
      showMethod(Thread.class);
   }
 
   public static void showMethod(Class class1) {
      System.out.println("Class :: " + class1.getName());
  
      Class[] cll = class1.getClasses();
      System.out.println("Classes :: " + Arrays.asList(cll));
    
      Class[] intr = class1.getInterfaces();
      System.out.println("Interfaces :: " + Arrays.asList(intr));
   }
}

Test it Now

Output:

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

Example 2

//import statements
 
import java.io.Serializable;

public class ClassgetInterfacesExample2 {

    public static void main(String... args) {
        Class<SampleClass> cls1 = SampleClass.class;
        Class<?>[] interfaces = cls1.getInterfaces();
        for (Class<?> intrfc : interfaces) {
            System.out.println(intrfc);
        }
    }

    private static class SampleClass implements Serializable, Runnable{
        @Override
        public void run() {

        }
    }

}

Test it Now

Output:

interface java.io.Serializable
interface java.lang.Runnable

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