How to resize data in JTable?

Question

Hi all,
I wish to provide a resize button on an application which will resize the data in a table (in most cases just text) as well as the table containing it. Is it possible to directly resize the table or must I change the renderer to draw all of the data bigger? I'm also not sure how to increase the width of the table. Any help would be much appreciated.
package gui;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.table.DefaultTableModel;
public class Resizer extends JFrame
     * @see java.io.Serializable
    public static final long serialVersionUID = 0;
     * Table containing data
    private JTable table = null;
     * Scroll pane containing table
    private JScrollPane scroller = null;
     * Name of button to increase text size
    private static final String INCREASE = "Increase";
     * Name of button to decrease text size
    private static final String DECREASE = "Decrease";
     * An increment to use when resizing
    private static final int INCREMENT = 5;
    public Resizer()
        setTitle("Resizer");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300,200);
        getContentPane().setLayout(new BorderLayout());
        // Add the table and its contents
        table = createTable();
        scroller = new JScrollPane(table);
        getContentPane().add(scroller, BorderLayout.CENTER);
        // Add buttons to resize
        JButton increase = new JButton(INCREASE);
        increase.addActionListener(new ButtonListener());
        JButton decrease = new JButton(DECREASE);
        decrease.addActionListener(new ButtonListener());
        JPanel panel = new JPanel();
        panel.add(increase);
        panel.add(decrease);
        getContentPane().add(panel, BorderLayout.SOUTH);
        // Show this window
        setLocationRelativeTo(null);
        setVisible(true);
    private JTable createTable()
        JTable t = new JTable();
        t.setModel(new MyModel());
        // Row 1
        t.getModel().setValueAt("John", 0, 0);
        t.getModel().setValueAt(new Integer(1), 0, 1);
        // Row 2
        t.getModel().setValueAt("Chris", 1, 0);
        t.getModel().setValueAt(new Integer(2), 1, 1);
        // Row 3
        t.getModel().setValueAt("Susan", 2, 0);
        t.getModel().setValueAt(new Integer(3), 2, 1);
        return t;
    private class MyModel extends DefaultTableModel
        private static final long serialVersionUID = 2;
        public MyModel()
            this.setColumnCount(2);
            this.setRowCount(3);
        public String getColumnName(int col)
            switch(col)
            case 0:
                return "Name";
            case 1:
                return "Number";
            default:
                return "Oops";
    private class ButtonListener implements ActionListener
        public void actionPerformed(ActionEvent ae)
                if (((JButton)ae.getSource()).getText().equals(INCREASE))
                    increaseTable();  
                else if (((JButton)ae.getSource()).getText().equals(DECREASE))
                    decreaseTable();
    private void increaseTable()
        this.setSize(this.getWidth()+INCREMENT, this.getHeight()+INCREMENT);
        table.setRowHeight(table.getRowHeight()+INCREMENT);
        table.setSize(table.getWidth()+INCREMENT, table.getHeight()+INCREMENT);
    private void decreaseTable()
        this.setSize(this.getWidth()-INCREMENT, this.getHeight()-INCREMENT);
        table.setRowHeight(table.getRowHeight()-INCREMENT);
        table.setSize(table.getWidth()-INCREMENT, table.getHeight()-INCREMENT);
    public static void main(String[] args)
        SwingUtilities.invokeLater(new Runnable()
            public void run()
                new Resizer();
}Using JDK 1.4.2

Answer 1

Thanks all.
The solution was to use setFont() on the table and its headers. Here's what I put in to increase and descrease the table size (for future reference).
     * Increases the size of everything in the table
    private void increaseTable()
        table.setRowHeight(table.getRowHeight() + INCREMENT);
        table.setSize(table.getWidth() + INCREMENT, table.getHeight() + INCREMENT);
        for (int i = 0; i < table.getColumnCount(); i++)
            TableColumn col = table.getColumnModel().getColumn(i);
            col.setWidth(col.getWidth() + INCREMENT / table.getColumnCount());
        Font headerFont = table.getTableHeader().getFont();
        table.getTableHeader().setFont(headerFont.deriveFont(headerFont.getSize2D()+INCREMENT));
        Font dataFont = table.getFont();
        table.setFont(dataFont.deriveFont(dataFont.getSize2D() + INCREMENT));
     * Decreases the size of everything in the table
    private void decreaseTable()
        if (table.getRowHeight() > INCREMENT)
            table.setRowHeight(table.getRowHeight() - INCREMENT);
            table.setSize(table.getWidth() - INCREMENT, table.getHeight() - INCREMENT);
            for (int i = 0; i < table.getColumnCount(); i++)
                TableColumn col = table.getColumnModel().getColumn(i);
                col.setWidth(col.getWidth() - INCREMENT / table.getColumnCount());
            Font headerFont = table.getTableHeader().getFont();
            table.getTableHeader().setFont(headerFont.deriveFont(headerFont.getSize2D()-INCREMENT));
            Font dataFont = table.getFont();
            table.setFont(dataFont.deriveFont(dataFont.getSize2D() - INCREMENT));
    }