Java Swing: Rendeder not being called

I have created a custom renderer class that extends DefaultTableCellRenderer.

This code works fine with the example I have attached.

But, the funny thing is that the ColorRenderer is not being called by to another table with a custom table model that I created (it extends DefaultTableModel).

I added this code to getTableCellRendererComponent():
System.out.println(row + " " + column);

When I run the test code to the example below, all the row and column numbers are printed. However, this does not happen for my table!

If possible, please let me know what I could be missing. Thanks!

import javax.swing.*;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import java.awt.*;

public class TableRowColor2 extends JFrame

    {
         static  JTable table;
     public TableRowColor2()
         {
              table=new JTable(new DefaultTableModel(new Object[][]{
             {"1","2","3","4"},
             {"2","3","4","5"},
             {"3","4","5","6"},
         {"4","5","6","7"}},
         new Object[]{"A","B","C","D"}));

            // table.setDefaultRenderer(Object.class, new ColorRenderer(1,1));

              //  table.setDefaultRenderer(Object.class, new ColorRenderer(2,2));


         JScrollPane scroll=new JScrollPane(table);
         this.setContentPane(scroll);
         this.setBounds(100,50,300,150);
     }
     public static void main (String arg[])
         {
         TableRowColor2 tes = new TableRowColor2();
         tes.setVisible(true);

               table.setDefaultRenderer(Object.class, new ColorRenderer(1,1));
             System.out.println("here 1");
              try{
                           Thread.currentThread().sleep(5000);
             } catch(Exception ex){
                 ex.printStackTrace();
             }
             System.out.println("here 2");
             table.setDefaultRenderer(Object.class, new ColorRenderer(2,2));
             tes.repaint();
             System.out.println("here 3");
         tes.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     }
}


class ColorRenderer extends  DefaultTableCellRenderer
    {
     private String columnName;
        int row1;
        int column1;
     public ColorRenderer(int row1, int column1)
         {
         this.row1 = row1;
             this.column1 = column1;
        // this.columnName = column;
         setOpaque(true);
     }
     public Component getTableCellRendererComponent(JTable table, Object value,boolean isSelected, boolean hasFocus, int row, int column)
         {
             if (row == row1 && column == column1)setBackground(Color.red);
             else  setBackground(Color.gray);

         return this;
     }
}

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