999: Mainline

Once you have a new renderer, you can put it to use by connecting it to a table with the setDefaultRenderer method. Note, however, that renderers are associated with column classes, which are determined by the getColumnClass method in the table model. The definition of getColumnClass defined by the DefaultTableModel class inconveniently reports every column as having an Object column class.

Accordingly, you need to modify the behavior of the getColumnClass method by having it report the class of the element in the zeroth row; you obtain that class using the getClass method:

import java.util.*; 
import javax.swing.table.*; 
public class RatingTableModel extends DefaultTableModel { 
 public RatingTableModel (Vector rows, Vector columns) { 
  super(rows, columns); 
 } 
 public boolean isCellEditable(int row, int column) { 
  return false; 
 } 
 // Define shadowing method 
 public Class getColumnClass(int column) { 
  return getValueAt(0, column).getClass(); 
 } 
}