I need help to write a java interface

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C++

Java

I need help to Write a Java interface called Reversible which has a single method public void reverse(), where it reverses the elements in a list.

What I have tried:

I have tried

import java.util.ArrayList;

import java.util.Collections;


public class ReverseListOrder {

  
  public static void main(String[] args) {


    ArrayList arrayList = new ArrayList();

    arrayList.add("0");

    arrayList.add("1");

    arrayList.add("2");

    arrayList.add("3");
    arrayList.add("4");

 
   System.out.println("ArrayList elements : " + arrayList);

  
  Collections.reverse(arrayList);

    System.out.println("ArrayList elements after reversing order : " + arrayList);

}
}

but i dont think this is an 'interface'.