Inferred type is not a valid substitute for a Comparable generic type

Question

Consider the code:

public abstract class Item implements Comparable
{
    protected T item;

    public int compareTo(T o)
    {
        re         


        

Answer 1

Just change the class like follow:

     public class MyItem extends Item implement Comparable>
     {
         T object;
     }

Or

       public abstract class Item implements Comparable>
       {
           protected T item;

           public int compareTo(MyItem o)
           {
              return 0; // this doesn't matter for the time being
       }

}

The error tips has shown us.Hope it helpful.