connect-four/src/de/itsblue/ConnectFour/ConnectFour.java

package de.itsblue.ConnectFour;

import javax.swing.*;
import java.awt.*;

import java.awt.Dimension;
import javax.swing.JFrame;

import java.awt.Container;
import java.awt.BorderLayout;

public class ConnectFour extends JFrame {
    /**
     *
     */
    private static final long serialVersionUID = 1L;

    static int r = 6;
    static int c = 7;
    static int p; // Player
    static int[][] Gamefield = new int[c][r];
    static int[] filllevel = new int[r];
    static boolean finish;

    // start
    static GridLayout BoardLayout = new GridLayout(7, 6);

    public ConnectFour(final String name) {
        super(name);
        setResizable(false);
    }

    public static void addComponentsToPane(final Container pane) {
        final JPanel field = new JPanel();
        field.setLayout(BoardLayout);

        // Set up components preferred size
        JButton b = new JButton(" ");
        Dimension buttonSize = b.getPreferredSize();
        field.setPreferredSize(new Dimension((int) (buttonSize.getWidth() * 2.5), (int) (buttonSize.getHeight() * 20)));

        // Add buttons to experiment with Grid Layout
        // field.add(new JButton("Button 2"));

        for (int i = 1; i < 8; i++) {
            field.add(new JButton("" + i));
        }
        for (int i = 1; i < c; i++) {
            // // first column
            field.add(new Plate(Plate.PlateType.O)); 
            for (int j = 0; j < r; j++) {
                // field.add(new Plate(Plate.PlateType.X));

                if (Gamefield[i][j] == 0)       //FIXME
                   field.add(new Plate(Plate.PlateType.X)); 
                   
                else if (Gamefield[i][j] == 1)
                    field.add(new Plate(Plate.PlateType.X));
                else
                    field.add(new Plate(Plate.PlateType.O));

            }
        }

        // Add controls to set up horizontal and vertical gaps
        pane.add(field, BorderLayout.CENTER);
    }

    static void winningCondition() {
        for (int i = 0; i <= 2; i++)
            for (int j = 0; j <= 6; j++) {
                if (Gamefield[i][j] == p && Gamefield[i + 1][j] == p && Gamefield[i + 2][j] == p
                        && Gamefield[i + 3][j] == p) {
                    finish = true;
                }
            }
        for (int i = 0; i <= 5; i++)
            for (int j = 0; j <= 3; j++) {
                if (Gamefield[i][j] == p && Gamefield[i][j + 1] == p && Gamefield[i][j + 2] == p
                        && Gamefield[i][j + 3] == p)
                    finish = true;
            }

        for (int i = 0; i <= 2; i++)
            for (int j = 0; j <= 3; j++) {
                if (Gamefield[i][j] == p && Gamefield[i + 1][j + 1] == p && Gamefield[i + 2][j + 2] == p
                        && Gamefield[i + 3][j + 3] == p)
                    finish = true;
            }

        for (int i = 0; i < 3; i++)
            for (int j = 6; j > 2; j--) {
                if (Gamefield[i][j] == p && Gamefield[i + 1][j - 1] == p && Gamefield[i + 2][j - 2] == p
                        && Gamefield[i + 3][j - 3] == p)
                    finish = true;
            }
    }

    static void switchPlayer() {
        if (p != 1)
            p = 1;
        else
            p = 1;
    }

    ConnectFour() {
        // Constructor

        // initialize window
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        addComponentsToPane(this.getContentPane());
        this.setPreferredSize(new Dimension(600, 600));

        // finish up
        this.pack();
        this.setVisible(true);
    }

    public static void main(final String[] args) {
        System.out.println(new ConnectFour());

    }
}