I suggest looking at JInputPanels and JOptionPanels in javax.swing. They're pretty low-fi, but they save the trouble of making a class yourself to read text input. I would suggest having an array of already used user/pass combinations and check the input against the array. Good luck!

On the other hand, popup input panels (that Swing provides) are very annoying for the user. There are a already several Greenfoot GUI libraries: GUI Components TextBox01 Greenfoot GUI UILibrary GUI World Even if none of them have an input field, you could probably implement one by using a regular text field as a basis.

It's true. Swing input panels are quite annoying, but they are very easy to program with and it will be more original work for your assignment instead of snagging someone's else's code snippet.

There's nothing wrong with reusing someone else's code (providing you attribute it) in fact I'd say that's a good thing, it shows initiative rather than reinventing the wheel! Learning to code in swing is very useful generally, but there's all sorts of subtle things that you need to know about to do it properly without introducing the potential for subtle bugs. That combined with the fact that it generally looks far better from an aesthetic perspective, I'd always advise going for integrated components in Greenfoot rather than annoying Swing popups. Not that I can talk, I'm sure I've used them at least once or twice when I was in a rush...!

Thanks for the advice... I decided to use bourne's GUI and then modify it to act as two components that work as a team to identify a username/ password combo. Thanks!