Java Programming GUI issues, how to check for win?

This is my code for the game of mastermind, the button i added screwed up the grids so now they are a wierd diagonal pattern. also, i need some way to check for a winner with the button i named "winCheck". Can somebody help me come up with a block of code that will enable me to do this, and where i should put it

package mastermind;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.Random;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;

/**
 *
 * @author student
 */
public class Game {
private JFrame window;
private JPanel[] square;
private JPanel mPanel;
private JLabel[] marker;
private JLabel[] indicator;
private JButton winCheck;
private static Random rand;
private final int NUM_ROWS = 11;
private final int NUM_COLS = 5;
private JMenuBar menuBar;
private JMenu optionMenu, rulesMenu, aboutMenu;
private JMenuItem[] optionMenuItem;
private JMenuItem[] rulesMenuItem;
private JMenuItem aboutMenuItem;

public Game() {

    window = new JFrame("Mastermind");
    window.setSize(400,600);
    window.setBackground(Color.BLACK);
    window.setLocationRelativeTo(null);
    window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    window.setLayout(new GridLayout(NUM_ROWS, NUM_COLS,2,3));
    winCheck = new JButton("Check");




    square = new JPanel[NUM_ROWS*NUM_COLS];
    marker = new JLabel[NUM_ROWS*NUM_COLS];
    mPanel = new JPanel();
    mPanel.add(winCheck);

    for(int i=0; i<square.length; i++) {
        square[i] = new JPanel();
        square[i].setName("" + i);
        square[i].addMouseListener(new ClickListener());
        square[i].setBackground(Color.WHITE);
        square[i].setLayout(new BorderLayout());
        square[i].add(mPanel,BorderLayout.PAGE_END);
        square[i].add(winCheck, BorderLayout.WEST);

        if(i%5!=4) {
            marker[i] = new JLabel();
            square[i].add(marker[i]);
            marker[i].setOpaque(true);


        }


    }

    menuBar = new JMenuBar();
    optionMenu = new JMenu("Options");
    rulesMenu = new JMenu("Rules");
    aboutMenu = new JMenu("About");
    optionMenuItem = new JMenuItem[3];
    rulesMenuItem = new JMenuItem[2];
    aboutMenuItem = new JMenuItem("About Mastermind");
    for(int i=0; i<optionMenuItem.length; i++)
        optionMenuItem[i] = new JMenuItem();
    optionMenuItem[0].setText("Undo move");
    optionMenuItem[1].setText("Restart");
    optionMenuItem[2].setText("Exit");
    rulesMenuItem[0] = new JMenuItem("text here");
    rulesMenuItem[1] = new JMenuItem("text here");
    aboutMenu.add(aboutMenuItem);
    rulesMenu.add(rulesMenuItem[0]);
    rulesMenu.add(rulesMenuItem[1]);
    for(int i=0; i<optionMenuItem.length; i++)
        optionMenu.add(optionMenuItem[i]);
    menuBar.add(optionMenu);
    menuBar.add(rulesMenu);
    menuBar.add(aboutMenu);
    for(JPanel p:square)
        window.add(p);
    window.setJMenuBar(menuBar);
    window.setVisible(true);

   // marker[49].getLayout();
    //square[54].setLayout(new GridLayout(2,2,2,3));
    square[49].setLayout(new GridLayout(2,2,2,3));
    square[44].setLayout(new GridLayout(2,2,2,3));
    square[39].setLayout(new GridLayout(2,2,2,3));
    square[34].setLayout(new GridLayout(2,2,2,3));
    square[29].setLayout(new GridLayout(2,2,2,3));
    square[24].setLayout(new GridLayout(2,2,2,3));
    square[19].setLayout(new GridLayout(2,2,2,3));
    square[14].setLayout(new GridLayout(2,2,2,3));
    square[9].setLayout(new GridLayout(2,2,2,3));
    square[4].setLayout(new GridLayout(2,2,2,3));
    indicator = new JLabel[4*NUM_ROWS];
    for(int i=0; i<indicator.length; i++) {
        indicator[i] = new JLabel();
        indicator[i].setBackground(Color.LIGHT_GRAY);
        indicator[i].setOpaque(true);
    }
    for(int i=4; i<square.length; i=i+5) {
        for(int j=4; j>0; j--)
            square[i].add(indicator[i-j-i/5]);
}
    window.add(mPanel);


}        

private class ButtonListener implements ActionListener {

    @Override
    public void actionPerformed(ActionEvent e) {

    }

}    


private class ClickListener implements MouseListener {

    @Override
    public void mouseClicked(MouseEvent me) {
        int loc = Integer.parseInt(((JPanel)(me.getSource())).getName());


        if(((JPanel)(me.getSource())).getBackground().equals(Color.WHITE)) {
           ((JPanel)(me.getSource())).setBackground(Color.RED);
        }
        else if(((JPanel)(me.getSource())).getBackground().equals(Color.RED)) {
           ((JPanel)(me.getSource())).setBackground(Color.BLUE);
        }
        else if(((JPanel)(me.getSource())).getBackground().equals(Color.BLUE)) {
           ((JPanel)(me.getSource())).setBackground(Color.YELLOW); 
        }
        else if(((JPanel)(me.getSource())).getBackground().equals(Color.YELLOW)) {
           ((JPanel)(me.getSource())).setBackground(Color.GREEN);
        }
        else if(((JPanel)(me.getSource())).getBackground().equals(Color.GREEN)) {
           ((JPanel)(me.getSource())).setBackground(Color.RED);
        }






    }

    @Override
    public void mousePressed(MouseEvent me) {
       // throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void mouseReleased(MouseEvent me) {
       // throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void mouseEntered(MouseEvent me) {
       // throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    @Override
    public void mouseExited(MouseEvent me) {
       // throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
}
}