Re: Help. Generics notation really <P> me off

Jacob Singer wrote:


Please do not top-post.

As Joshua explained, T is not a variable. Shape.class is a variable. T is
like 'Shape' in the expression, as Joshua said, not 'Shape.class'.

You need the equivalent of T.class, except for you can't use that so you have
to pass in a Class<? extends T> somehow, just as Joshua said.


Ellipses don't compile, and "Object" is not a good class-name part.

Another approach is to make the Container class generic, too.

  public class Container<T extends Shape>
  {
    public static MySet <T> query()

// Notice how the keyword "Class" is spelled with an upper-case 'C'.

    {
      return null;
    }
  }

<!-- -->

  public class MyUsefulName <T extends Shape>
  {
    private final Container<T> container = initContainer();
    public void exec()
    {
      MySet <T> stuff = container.query();
      doMoreWith( stuff );
    }
  }

I didn't try to compile this, but it's a start for sure.

--
Lew