JLabel do not Appear On JPanel

Question

Help! PPl I am upto my eyes in this problem and I cannot solve it.
I have a JFrame with BorderLayout on which I have 2 JPanels.The JPanel on the SOUTH of borderLayout is called secPanel and the one at the CENTER is called newPanel.
On newPanel I am basically trying to make a lot of squares appear some should be whit and some black which is based on a random calculation. I have put in a lot of time on this and it worked on the first go and now it does not seem to work after I changed some code which I cannot recall what I did wrong. Now all the calculcations work out fine and everything only the squares which are really JLabels with a single space character in them are not displayed . The main file proj.java and the file that contains class aSquare are give below can someone please have a look and tell me how can I do it RIGHT! PLEASE
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class proj
     public static void main(String args[])
          JFrame aFrame= new JFrame("This is a Test");
          aFrame.addWindowListener(new WindowAdapter()
          {public void windowClosing(WindowEvent e)
          {System.exit(0);
          aFrame.setSize(700,700);
          Container c = aFrame.getContentPane();
          //c.setBackground(Color.blue);
          JPanel secPanel = new JPanel();
          secPanel.setLayout(new GridLayout(1,3));
          secPanel.setBackground(Color.gray);
          secPanel.setOpaque(false);
          secPanel.setBorder(BorderFactory.createEtchedBorder());
          JButton first, second, third;
          first= new JButton("Initialise New Maze");
          second = new JButton("Random New Genes");
          third = new JButton("Run Halt Genes");
          secPanel.add(first);
          secPanel.add(second);
          secPanel.add(third);
          JPanel newPanel = new JPanel();
          newPanel.setLayout(null);
          newPanel.setOpaque(true);
          newPanel.setBorder(BorderFactory.createEtchedBorder());
          newPanel.setVisible(true);
          aSquare squares[][] = new aSquare[40][40];
          int xPos=5;
          int yPos=5;
          for(int i=0; i<40; i++)
               yPos= yPos+10;
               xPos=5;
               for(int j=0; j<40;j++)
                    xPos= xPos+10;
                    squares[i][j] = new aSquare(i,j);
                    if (nZrandom()%nZrandom()== 0 && nZrandom()%nZrandom() == 0)
                         squares[i][j].changeColor(Color.black);
                         System.out.println("MAde Black"+i+" "+j);
                    squares[i][j].setBounds(xPos, yPos,10,10);
                    System.out.println(xPos+" "+yPos);
                    newPanel.add(squares[i][j]);
               }//end for j
          }//end for i
          newPanel.setOpaque(false);
          c.add(newPanel,BorderLayout.CENTER);
          c.add(secPanel,BorderLayout.SOUTH);
          aFrame.setVisible(true);
          aFrame.show();
     }//end main
     public static int nZrandom()
          int randno =(int)(Math.random()*10);
          while (true)
               if (randno != 0)
                    return randno;
               }else
                    randno = (int)(Math.random()*10);
               }//end if
          }//end while
     }//end nZrandom
}//end class proj
CLASS aSquare
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
class aSquare extends JLabel implements MouseListener
     private int x, y;
     private boolean wall, beenThere;
     public aSquare(int a,int b)
          super(" ");
          this.setOpaque(true);
          this.setBackground(Color.white);
          this.setToolTipText(String.valueOf(a)+","+String.valueOf(b));
          this.setVisible(true);
          this.addMouseListener(new MouseAdapter()
               public void mousePressed(MouseEvent e)
                    if (((JLabel)e.getSource()).getBackground().equals(Color.black))
                         ((JLabel)e.getSource()).setBackground(Color.white);
                    System.out.println("You are on the Label");
                    }else
                         ((JLabel)e.getSource()).setBackground(Color.white);
                         System.out.println("You are on the Label");
                    }//end if
          int x=a;
          int y=b;
          wall= false;
          beenThere= false;
     }//end constructor;
     public void changeColor(Color change)
          this.setBackground(change);
          if (change.equals(Color.cyan))
               this.setBeenThere(true);
          if(change.equals(Color.black))
               this.setWall(true);
     }//end changeColor
     public void mousePressed(MouseEvent me)
     public void mouseClicked(MouseEvent me)
     public void mouseReleased(MouseEvent me){}
     public void mouseEntered(MouseEvent me){}
     public void mouseExited(MouseEvent me){}
     public int getX()
     return this.x;
     public int getY()
     return this.y;
     public boolean getBeenThere()
     return this.beenThere;
     public void setBeenThere(boolean beenThere)
     this.beenThere = beenThere;
     public boolean getWall()
     return this.wall;
     public void setWall(boolean wall)
     this.wall = wall;
}//end class aSquare

Answer 1

There seems to be some problem in getting the label to display at the proper location on the JPanel cos I just wrote short code in which I pasted a JLabel and one instance of my class aSquare here renamed to Alab .
the label get displayed at the proper location but the instance of class Alab does not . I went through the code line by line but I cannot understand it at all.. U have been very kind and patient.. can u gimme a hand with this one...
thanks again..
here is the small code
//code
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
class LabelTry
     public static void main(String args[])
          JFrame aFrame= new JFrame("This is a Test");
          aFrame.addWindowListener(new WindowAdapter()
          {public void windowClosing(WindowEvent e)
          {System.exit(0);
          aFrame.setSize(500,500);
          Container c = aFrame.getContentPane();
          JPanel secPanel = new JPanel();
          secPanel.setLayout(null);
          secPanel.setBackground(Color.gray);
          secPanel.setOpaque(true);
          secPanel.setBorder(BorderFactory.createEtchedBorder());
          JLabel aLabel = new JLabel(" ");
          aLabel.setBounds(200,200,10,10);
          aLabel.setBackground(Color.black);
          aLabel.setOpaque(true);
          aLabel.setVisible(true);
          Alab bLabel = new Alab(1,2);
          bLabel.setBounds(200,200,10,10);
          bLabel.setBackground(Color.black);
          bLabel.setOpaque(true);
          bLabel.setVisible(true);
          secPanel.add(aLabel);
          secPanel.add(bLabel);
          c.add(secPanel, BorderLayout.CENTER);
          aFrame.setVisible(true);
     }//end main
}//end class LabelTry
CLASS ALAB //WHICH IS NOTHING BUT class aSquare
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
class Alab extends JLabel implements MouseListener
     private int x, y;
     private boolean wall, beenThere;
     public Alab(int a,int b)
          super(" ");
          this.setOpaque(true);
          this.setBackground(Color.white);
          this.setToolTipText(String.valueOf(a)+","+String.valueOf(b));
          this.setVisible(true);
          this.addMouseListener(new MouseAdapter()
               public void mousePressed(MouseEvent e)
                    if (((JLabel)e.getSource()).getBackground().equals(Color.black))
                         ((JLabel)e.getSource()).setBackground(Color.white);
                    System.out.println("You are on the Label");
                    }else
                         ((JLabel)e.getSource()).setBackground(Color.white);
                         System.out.println("You are on the Label");
                    }//end if
          int x=a;
          int y=b;
          wall= false;
          beenThere= false;
     }//end constructor;
     public void changeColor(Color change)
          this.setBackground(change);
          if (change.equals(Color.cyan))
               this.setBeenThere(true);
          if(change.equals(Color.black))
               this.setWall(true);
     }//end changeColor
     public void mousePressed(MouseEvent me)
     public void mouseClicked(MouseEvent me)
     public void mouseReleased(MouseEvent me){}
     public void mouseEntered(MouseEvent me){}
     public void mouseExited(MouseEvent me){}
     public int getX()
     return this.x;
     public int getY()
     return this.y;
     public boolean getBeenThere()
     return this.beenThere;
     public void setBeenThere(boolean beenThere)
     this.beenThere = beenThere;
     public boolean getWall()
     return this.wall;
     public void setWall(boolean wall)
     this.wall = wall;
}//end class aSquare