Addition to Comparable interface

Mark Thornton mthornton at
Tue Mar 31 08:13:14 PDT 2009

Roy van Rijn wrote:
>>> The return value of the Comparable interfae could be made a lot
>>> clearer if it would have the following static variables:
>>>    public static int BEFORE = -1;
>>>    public static int EQUAL = 0;
>>>    public static int AFTER = 1;
>> This might give the impression that the only values returned by compareTo
>> are -1, 0, 1 which is certainly not true. The interface only requires that
>> the sign of the returned value reflect the ordering.
> That might be a problem indeed, but the javadoc should still indicate
> its possible to use any positive and negative integer value.
> The problem I've seen a lot is the following, even in large corporate
> programs, when people compare integers like this:
As Reinier points out this is the wrong list for this proposal.
However a better solution might be to add,int) and, int) methods, and encourage people to use tham inside 
of writing the comparison themselves.

Mark Thornton

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