4. stop hi-jacking threads
5. don't post complete code (at least initially)

from a quick glance i'd say your contructor isn't trimming the whitespaces correctly

The "==" operator won't evaluate two Strings as true unless they are the same object. You should use String.equals() instead.

firstNumber and secondNumber are Strings (I am pretty sure you know this). since they are strings, == will only evaluate true if they are the same object. you want to use .equals to compare Strings...

this link may help you: http://forums.java.net/jive/thread.jspa?threadID=42506

there is also a link at the bottom of the page to a sun reference. one of my guesses would be the fact that repaint()...

what is the point in returning "enter" when all your logic related to "enter" is already complete within the method? and as i said previously, simply returning a value is useless unless you actually...

Pretty much worked straight away for me. All I did was create a new project, delete the default package and copy in your package instead. DoodleBug.java was missing a package statement, but that was...