Adding a JPanel from one class to another Class (which extends JFrame)

Question

Hi everyone,
So hopefully I go about this right, and I can figure out what I'm doing wrong here. As an exercise, I'm trying to write a Tic-Tac-Toe (TTT) game. However, in the end it will be adaptable for different variations of TTT, so it's broken up some. I have a TTTGame.java, and TTTSquareFrame.java, and some others that aren't relavent.
So, TTTGame:import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import joshPack.jUtil.*;
public class TTTGame extends JFrame
     private Integer sides = 3;
     private TTTSquareFrame mainSquare;
     private TTTGame newGame;
     private Container contents;
     private JPanel mainSquarePanel, addPanel;
     public static void main(String [] args)
          TTTGame newGame = new TTTGame();
          newGame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     public TTTGame()
          super("Tic-Tac-Toe");
          contents = getContentPane();
          contents.setLayout(new FlowLayout());
          addPanel = startSimple();
          if(!addPanel.isValid())
               System.out.println("Something's wrong");
          contents.add(addPanel);
          setSize(300, 300);
          setVisible(true);
     public JPanel startSimple()
          mainSquare = new TTTSquareFrame(sides);
          mainSquarePanel = mainSquare.createPanel(sides);
          return mainSquarePanel;
}and TTTSquareFrame:import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import joshPack.jUtil.Misc;
public class TTTSquareFrame
     private JPanel squarePanel;
     private JButton [] squares;
     private int square, index;
     public TTTSquareFrame()
          System.out.println("Use a constructor that passes an integer specifying the size of the square please.");
          System.exit(0);
     public TTTSquareFrame(int size)
     public JPanel createPanel(int size)
          square = (int)Math.pow(size, 2);
          squarePanel = new JPanel();
          squarePanel.setLayout(new GridLayout(3,3));
          squares = new JButton[square];
          System.out.println(MIN_SIZE.toString());
          for(int i = 0; i < square; i++)
               squares[i] = new JButton();
               squares.setRolloverEnabled(false);
               squares[i].addActionListener(bh);
               //squares[i].setMinimumSize(MIN_SIZE);
               squares[i].setVisible(true);
               squarePanel.add(squares[i]);
          squarePanel.setSize(100, 100);
          squarePanel.setVisible(true);
          return squarePanel;
}I've successfully added panels to JFrame within the same class, and this is the first time I'm modularizing the code this way. The issue is that the frame comes up blank, and I get the message "Something's wrong" and it says the addPanel is invalid. Originally, the panel creation was in the constructor for TTTSquareFrame, and I just added the mainSquare (from TTTGame class) to the content pane, when that didn't work, I tried going about it this way. Not exactly sure why I wouldn't be able to add the panel from another class, any help is greatly appreciated.
I did try and cut out code that wasn't needed, if it's still too much let me know and I can try and whittle it down more. Thanks.

Answer 1

Yea, sorry 'bout that, I just cut out the parts of the files that weren't relevant but forgot to compile it just to make sure I hadn't left any remnants of what I had removed. For whatever it's worth, I have no idea what changed, but something did and it is working now. Thanks for your help, maybe next time I'll post an actual question that doesn't somehow magically solve itself.
EDIT: Actually, sorry, I've got the panel working now, but it's tiny. I've set the minimum size, and I've set the size of the panel, so...why won't it respond to that? It almost looks like it's being compressed into the top of the panel, but I'm not sure why.
I've compressed the code into:
TTTGame.java:
import java.awt.*;
import javax.swing.*;
public class TTTGame extends JFrame
     private Integer sides = 3;
     private TTTSquareFrame mainSquare;
     private TTTGame newGame;
     private Container contents;
     private JPanel mainSquarePanel, addPanel;
     public static void main(String [] args)
          TTTGame newGame = new TTTGame();
          newGame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     public TTTGame()
          super("Tic-Tac-Toe");
          contents = getContentPane();
          contents.setLayout(new FlowLayout());
          mainSquare = new TTTSquareFrame(sides.intValue());
          contents.add(mainSquare);
          setSize(400, 400);
          setVisible(true);
}TTTSquareFrame.java
import java.awt.*;
import javax.swing.*;
public class TTTSquareFrame extends JPanel
     private JButton [] squares;
     private int square, index;
     private final Dimension testSize = new Dimension(50, 50);
     public TTTSquareFrame(int size)
          super();
          square = (int)Math.pow(size, 2);
          super.setLayout(new GridLayout(size, size));
          squares = new JButton[square];
          for(int i = 0; i < square; i++)
               squares[i] = new JButton();
               squares.setMinimumSize(testSize);
               squares[i].setVisible(true);
               super.add(squares[i]);
          setSize(200, 200);
          setVisible(true);
I've made sure the buttons are smaller than the size of the panel, and the panel is smaller than the frame, so...
Message was edited by:
macman104