I need help developing the java code for the game 21 questions?

i need ideas on how to implement the game into code. Basically what i am going to do is bring a menu in which the user chooses whether the item they are thinking about is an animal, electronic item, food, clothes. The computer than asks 21 questions based on the the category chosen. I really need help with this, it would be appreciated if someone could write the pseudo code or at least give me ideas on how to implement the idea into code. The only cles i am using are BreezySwing, Terminal IO, Util, and javax. Code woud very helpful. If you could also include your e-mail so that i could send additional questions.