Make java class Comparable to 2 different Classes

Question

I would like to implement the Comparable Interface "Twice"

public class Segment implements Comparable<Segment,Point>{
@Override
public int compareTo(Segment o) {
    return 0;
}
@Override
public int compareTo(Point p) {
    return 0;
}

Is it possible in some way? (Without using the generic interface compareTo(Object o) i think it's nasty...)

Answer 1

Why dont you try this way

public class Segment implements Comparable<Object>{
     @Override
     public int compareTo(Object o) {
         if(o instanceof Segment)
         {
              return 0;
         }
         else if(o instanceof Point)
         {
             return 0;
         }

     }
}

Well if you really want to do it in your way, then you can just add another method using overloading (without adding the @Override annotation).

public class Segment implements Comparable<Segment>{
    @Override
    public int compareTo(Segment o) {
        return 0;
    }

    public int compareTo(Point p) {
       return 0;
    }
}

It will be useful if you call the compareTo method manually. I am not sure what will happen they called from some other library methods.