Thread: How to validate Radio buttons?

I need to validate radio buttons using an alert box. It also needs to work in conjunction with another validation how is this done? How do you validate a radio button? How do you validate?

Validating might be as simple as asking the user, "Are you sure?" with OK/Cancel buttons to more complicated verifications to determine that the choice is "legal" and executable according to program logic and what could happen next.

In my experience, radio buttons are typically low-level logic, not by themselves causing significant things to happen, so I'm curious why validation is even required. Perhaps you could give more detail.

Validation is required to ensure that a radio buttons have been selected and that the selected button is the correct one.

There are methods available to determine if a radio button has been selected. Look at both the radio button and button group classes to find the method you need for that part. As for the second part, to determine if the selected button is correct, that would involve whatever logic is required to determine correctness, something you haven't explained. Frankly, give the user a break and gray out radio buttons that aren't "correctly" selectable.

Ahhh. Thanks.

syntax to create radiobutton when you using applet
CheckBoxGroup x=new CheckBoxGroup();
add(new Checkbox("male",x,true);