How to set the border of header of JTable

I am using the following code to set the border of my JTable headers but it doesn't seem to work!! The headers do get CENTER aligned but somehow they do not show the right border. Please Help.
class cellAlignRenderer extends DefaultTableCellRenderer
cellAlignRenderer()
setHorizontalAlignment(JLabel.CENTER);
Border b = BorderFactory.createEtchedBorder() ;
setBorder(b);
jTable.getColumn(0).setHeaderRenderer( new cellAlignRenderer());

try this
public class YourTableHeaderRenderer extends DefaultTableCellRenderer
public YourTableHeaderRenderer()
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column)
JLabel comp = (JLabel) super.getTableCellRendererComponent(table,value,
isSelected,hasFocus,row,column);
try
comp.setBorder(BorderFactory.createBevelBorder(0,Color.lightGray,Color.darkGray));
setFont(new java.awt.Font("Dialog", 0, 15));
setHorizontalAlignment(SwingConstants.CENTER);
catch(Exception err)
err.printStackTrace();
return this;

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