title: How to force implementation of a method in subclass without using abstract?
body: <p>I want to force subclass to implement an implemented method of my mother class.
  I look this <a href="https://stackoverflow.com/questions/9675694/java-force-implementation-of-an-implemented-method">Java - Force implementation of an implemented method</a> but i can't convert my mother class to an abstract class.</p>
  
  <pre><code>public class myMotherClass { 
  
     myMethod {
  
        ...some code ..
  
     }
  
  }
  
  public class myClass extends myMotherClass {
  
     myMethod {
  
        ... other code ...
     }
  
  }
  </code></pre>
  
  <p>So, in this exemple, I want to force myClass implement myMethod.</p>
  
  <p>Sorry for my english...</p>