JLabel on JPanel Disappears(Small CODE!)

Question

Um... I had posted a message a earlier just ot make the complex problem simpler. I have made this small version of my massive code and again the JLabel does not get displayed on the JPanel.
This is urgent please help me.
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.setBorder(BorderFactory.createEtchedBorder());
          JLabel aLabel = new JLabel(" ");
          aLabel.setBounds(100,100,10,10);
          aLabel.setBackground(Color.black);
          aLabel.setOpaque(false);
          aLabel.setVisible(true);
          secPanel.setOpaque(false);
          secPanel.add(aLabel);
          c.add(secPanel, BorderLayout.CENTER);
          aFrame.setVisible(true);
     }//end main
}//end class LabelTry

Answer 1

I've got it working now, but I cannot get it to work in a bigger program.
the code that runs properly is as follows
/;code
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(false);
          secPanel.setBorder(BorderFactory.createEtchedBorder());
          JLabel aLabel = new JLabel(" ");
          aLabel.setBounds(200,200,10,10);
          aLabel.setBackground(Color.black);
          aLabel.setOpaque(true);
          aLabel.setVisible(true);
          secPanel.add(aLabel);
          c.add(secPanel, BorderLayout.CENTER);
          aFrame.setVisible(true);
     }//end main
}//end class LabelTry
//end code