Question

I’m Building a Client/server Desktop Application.

I wanted to know if it is possible to make a JTable Column Changes its color according to specific values from the database (oracle).

• Red= “Refused”.
• Green=”Accepted”.
• yellow=”Quarantine”.

Answer 1

Use a custom column renderer for this:

public class ColorColumnRenderer extends DefaultTableCellRenderer 
{
   Color bkgndColor, fgndColor;

   public ColorColumnRenderer(Color bkgnd, Color foregnd) {
      super(); 
      bkgndColor = bkgnd;
      fgndColor = foregnd;
   }

   public Component getTableCellRendererComponent
        (JTable table, Object value, boolean isSelected,
         boolean hasFocus, int row, int column) 
   {
      Component cell = super.getTableCellRendererComponent
         (table, value, isSelected, hasFocus, row, column);

      cell.setBackground( bkgndColor );
      cell.setForeground( fgndColor );

      return cell;
   }
}

You can use that renderer like this (example for a single column):

TableColumn tm = table.getColumnModel().getColumn(0);
tm.setCellRenderer(new ColorColumnRenderer(Color.lightGray, Color.blue));

Once you have the color changing code you can create a listener which listens for the value changes to the table model and by checking the changes you can apply the colors you want to specific columns.