Simple requirement about JTABLE

Question

hello friends,
Learning JTable...
Somewhere while searching i found a java file named QueryTableModel.java
which has extended the AbstractTableModel. I used it but was unable to format
Double (for amount etc) and Date. It alway returns String class and not Date, Double
etc. I dont know why .....
can somebody help me, guide me so that using cell renderers i can format the
data being populated in the JTable, as per my need?
thanks in advance
anandaScreen

Answer 1

The TableBasic class is about as simple as it gets for displaying a table. You add whatever objects you want to the TableModel and then override the getColumnClass() method to tell the table what type of data is in each column. The table will choose the appropriate renderer for the data type:
import java.awt.*;
import java.util.*;
import javax.swing.*;
public class TableBasic extends JFrame
     public TableBasic()
          String[] columnNames = {"Date", "String", "Integer", "Boolean"};
          Object[][] data =
               {new Date(), "A", new Integer(1), Boolean.TRUE },
               {new Date(), "B", new Integer(2), Boolean.FALSE},
               {new Date(), "C", new Integer(9), Boolean.TRUE },
               {new Date(), "D", new Integer(4), Boolean.FALSE}
          JTable table = new JTable(data, columnNames)
               //  Returning the Class of each column will allow different
               //  renderers to be used based on Class
               public Class getColumnClass(int column)
                    return getValueAt(0, column).getClass();
          table.setPreferredScrollableViewportSize(table.getPreferredSize());
          JScrollPane scrollPane = new JScrollPane( table );
          getContentPane().add( scrollPane );
     public static void main(String[] args)
          TableBasic frame = new TableBasic();
          frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
          frame.pack();
          frame.setLocationRelativeTo( null );
          frame.setVisible(true);
}