ERROR - Duplicate default methods named defaultMethod with the parameters () and () are inherited from the types DefaultMethodInterface2 and DefaultMethodInterface

Error

Duplicate default methods named [defaultMethod] with the parameters () and () are inherited from the types [DefaultMethodInterface2] and [DefaultMethodInterface] while using Default Method in Java 8

Error Type

Compile Time ( Java 8 )

Sample Code

DefaultMethodInterface

public interface DefaultMethodInterface {
   default public void defaultMethod(){
       System.out.println("Default Method");
   }  

}

DefaultMethodInterface2 

public interface DefaultMethodInterface2 {
    default public void defaultMethod(){
        System.out.println("Default Method 2");
    }

}

HelloJava8

public class HelloJava8 implements DefaultMethodInterface,DefaultMethodInterface2 {
   public static void main(String[] args){
       DefaultMethodInterface dmi = new HelloJava8();
       dmi.defaultMethod();
   }

}

   

Cause

Class cannot implement multiple Interfaces having Default Methods with same Name and Signature.

Resolutions

Make Class implement only one Interface.

public class HelloJava8 implements DefaultMethodInterface {
   public static void main(String[] args){
       DefaultMethodInterface dmi = new HelloJava8();
       dmi.defaultMethod();
   }

}

or 

Change the Method name in either of the Interface.

DefaultMethodInterface2 

public interface DefaultMethodInterface2 {
   default public void defaultMethod2(){
       System.out.println("Default Method 2");
   }

}