import scala.math.Ordering;
import scala.math.Ordering$;

public class J {
  public static void main(String[] args) {
    // Here's where we are really punished...
    // Again I see the generation of a Character method
    // as the only way out.
    Ordering<Object> charOrd = Ordering.Char$.MODULE$;
    
    charOrd.compare(new Object(), new Object());
  }
}

% scala29 J
java.lang.ClassCastException: java.lang.Object cannot be cast to java.lang.Character
	at scala.runtime.BoxesRunTime.unboxToChar(Unknown Source)
	at scala.math.Ordering$$Char$$.compare(Ordering.scala:181)
	at J.main(J.java:10)

// 2.8 only
import scala.math.Ordering;
import scala.math.Ordering$;
import scala.math.Ordering$Char$;

public class J {  
  public static void main(String[] args) {
    // Here's where we are really punished...
    // Again I see the generation of a Character method
    // as the only way out.
    Ordering<Object> charOrd = Ordering$Char$.MODULE$;
    
    charOrd.compare(new Object(), new Object());
  }
}

J.java:8: incompatible types
found   : scala.math.Ordering$$Char$$
required: scala.math.Ordering<java.lang.Object>
    Ordering<Object> charOrd = Ordering$$Char$$.MODULE$$;
                                             ^
1 error

Another lap around the track with generic signatures.
At the root of the issue reported in SI-4214 is our old friend
(fondly remembered from the days of primitive equality)
boxed/primitive unification.

  // scala
  trait T[A] {
    def f(): A
  }
  // the generic signature spec doesn't allow for parameterizing
  // on primitive types, so this cannot remain Char.  However
  // translating it to Character, as was done, also has issues.
  class C extends T[Char] {
    def f(): Char = 'a'
  }

  // Note that neither of the signatures for f, the implementation
  // or the bridge method, matches the type parameter.
  Generic interfaces in class:
    T<java.lang.Character>
  Generic signatures:
    public char C.f()
    public java.lang.Object C.f()

After this commit, primitive type parameters are translated into
Object instead of the boxed type.  It was martin's idea, so no review.
Closes SI-4214.