Java Predicament, classes within classes?

Question

I'm making TicTacToe in java...
So far, I've made it fully functional, but only for two players.  Now that I've added a CPU, I found that I need to entirely restructure my program.

The only problem I ever have is taking values out if methods, and putting them into others.  I finally figured that out, but now I'm messing with events, and private classes, that won't allow me to easily move values around.

Upon realizing this, I tried to put everything into one class.
Something like this
private static class Menu implements ActionListener {
        public void actionPerformed(ActionEvent evt) {
        }
}

This worked out great, but then when I started making the CPU, the program got confused because there were multiple if statements that were the same, but with different commands...

So I decided, I have to make multiple classes.  I figured out that I could, make multiple classes, and I learned alot by figuring this out.

Now though, my code will not run almost at all.  Before doing this, I could atleast play TicTacToe, but now I can't; I can only choose the options.

So basically, here's the question
How do I make the user able to choose to play against the CPU or another player?  Do I need to make a whole bunch of classes, and then one class that has an if statement, that runs all the classes?  That's what I'm thinking, but I need some help doing it.  I already tried making a huge if statement, going through each possible scenario of options, but it didn't work b/c of the nature of if statements and b/c there are two options to choose from.
This will probably involve emailing back and forth, unless my mistake is simple, and I am on the right track.

Here's the code 
http://ideone.com/fBL0Kv

Good Luck reading it, it's full of unfinished thoughts, and most definitely stupid mistakes.

I just don't know if I'm on the right path, or if I'm straying away.

I don't want too much help.  I've done all of this so far on my own

also, just so I don't look too dumb, here's the working PvP.  The difficulty selection doesn't make a difference, it all makes PvP TicTacToe

http://ideone.com/mt54FB

Thanks in advance (try not to take too long answering EX: writing the code for me), I'm going to bed soon, and I don't want much help.  Just some syntax of how to run classes in other classes (which I've attempted using
className arbitrary = new clasName();)

deonejuan · Accepted Answer

You are locking up your options with 'private' and 'static'. Those modifiers serve a purpose unrelated to your current efforts. I usually do something like this to generate an Object. When I have the Object in RAM, then I can utilize all the public properties of the Object.

public class Game {
public static void main( String[] args ) {
// generate an Object, one of two ways
new Game().init();
// or
Game game = new Game();
game.init();
...
Then, I would have other classes, such as GameTile, GameEngine. The use of external classes then makes 'private' 'protected' 'default' 'public' access modifiers invaluable. If I make 10 pizza Objects from the class Pizza, then having a private property price ensures that each pizza in RAM will have THE price that reflects that custom pizza.

Link below is for an applet of TicTacToe. Briefly, if the 9 squares of the board could be 000000000 or 111111111 that can be an int number that instantly determines a winner. The first part of the code, the .isWon() is checking the winning boards for each cycle of play. If you don't understand bit-shifting on an int, then try and design an int[] = new int[ 9]; or boolean[] = new boolean[9]

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Java Predicament, classes within classes?

1 Answer