On 06/08/13 21:52, Martin Buchholz wrote:
On Sat, Jun 8, 2013 at 8:50 AM, Doug Lea <d...@cs.oswego.edu <mailto:d...@cs.oswego.edu>> wrote:Suppose you have two objects, x and y, both of the same type (x.getClass() == y.getClass()) and both known to be instanceof Comparable. Can you compare them? That is, can you safely call (Comparable)x).compareTo(y); Probably others tried and gave up, because you cannot actually get a reliable answer - you can only get YES NO DUNNO, because some of the generic type information you need may have been erased.
Right, including the case where the class itself was declared with raw types. I should have stated that the method spec should say that a true return means YES, a false return means "not validated under best effort". -Doug
