I have been looking for some info about this topic but still nothing. I'm creating a JavaBean with two properties but one of them depends on the other one, so if the first one has a value 'false' the other one should be disabled but the problem is that i don't know how to do that!!! Since I'm using Sun One IDE i have notice that for example, when you create a JForm, within the properties sheet, into the Code tab, if I change the form size policy, some extra properties appear, so I guess it can be done for any other property, like a enable/disable, but as I mentioned I don't know how to do it. Can someone give some help, give one example, or put me in the right direction at least???