Levy Schiavetti Levy Schiavetti - 7 months ago 21
Java Question

Method with restrict parameter

When you try to give another value to the 3rd argument in

Toast.makeText
other than
Toast.LENGTH_LONG
or
Toast.LENGTH_SHORT
it won't accept.

I need to create a method and use the same type of restriction: it can only be accepted three values which I'll define previously using constants.

How can this be accomplished?

Answer

You can restrict the user by creating your own enum. Sample code:

public enum Notification {
    LONG,
    SHORT
}

Method which I want to restrict:

private void methodName(String value1, Notification value2){
// Write whatever you want to perform
}

Now, this method can only be called like:

methodName("", Notification.LONG); // Second Parameter is allowed only from your custom enum