On Monday, August 20, 2012 2:09:26 PM UTC-4, Knute Johnson wrote:
We need to see some code. I don't see the problem you describe in the code
below. Are you using AWT?
Here is code that yields a tiny line around the image.
public class Line extends javax.swing.JFrame
{
     public Line()
     {
         initComponents();
     }
     @SuppressWarnings("unchecked")
     // <editor-fold defaultstate="collapsed" desc="Generated Code">
     private void initComponents() {
         jLabel1 = new javax.swing.JLabel();
         setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
         setBackground(new java.awt.Color(51, 0, 153));
         setForeground(java.awt.Color.orange);
         jLabel1.setText("Remove Tiny Line");
         javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
         getContentPane().setLayout(layout);
         layout.setHorizontalGroup(
             layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
             .addGroup(layout.createSequentialGroup()
                 .addGap(149, 149, 149)
                 .addComponent(jLabel1)
                 .addContainerGap(150, Short.MAX_VALUE))
         );
         layout.setVerticalGroup(
             layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
             .addGroup(layout.createSequentialGroup()
                 .addGap(116, 116, 116)
                 .addComponent(jLabel1)
                 .addContainerGap(168, Short.MAX_VALUE))
         );
         pack();
     }// </editor-fold>
     public static void main(String args[])
     {
         try
         {
             for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels())
             {
                 if ("Nimbus".equals(info.getName()))
                 {
                     javax.swing.UIManager.setLookAndFeel(info.getClassName());
                     break;
                 }
             }
         } catch (ClassNotFoundException ex) {
             java.util.logging.Logger.getLogger(Line.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
         } catch (InstantiationException ex) {
             java.util.logging.Logger.getLogger(Line.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
         } catch (IllegalAccessException ex) {
             java.util.logging.Logger.getLogger(Line.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
         } catch (javax.swing.UnsupportedLookAndFeelException ex) {
             java.util.logging.Logger.getLogger(Line.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
         }
         //</editor-fold>
         java.awt.EventQueue.invokeLater(new Runnable()
         {
             public void run()
             {
                 new Line().setVisible(true);
             }
         });
     }
     // Variables declaration - do not modify
     private javax.swing.JLabel jLabel1;
     // End of variables declaration
}
I'm not seeing any line around the image or the JLabel.  A screen shot 
http://http://knutejohnson.com/line.png.  What is your configuration?
Your code would be a boat load more readable with some imports.