Help - Unwanted resizing buttons!

Question

Hello All:
I want to have tiled buttons in a JScrollPane where the buttons are always the same size. My problem now is that when the main window is resized smaller, the buttons scale themselves down in order to fit in the JPanel. Since the buttons always resize themselves to fit in the pane the scroll bars never appear.
How can I get the following code to display fixed sized buttons (with ImageIcons), so that I can scroll through 2 columns and many rows of the same size button?
package net.nighthawk.iid.viewer;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
public class ImageThumbnailPanel extends JPanel
  private JPanel panel;
  private GridLayout buttonLayout = new GridLayout();
  private int rows = 4;
  private static final int COLS = 1;
  public ImageThumbnailPanel()
    setLayout(new BorderLayout());
    panel = new JPanel();
    buttonLayout.setColumns(COLS);
    buttonLayout.setRows(rows);
    panel.setLayout(buttonLayout);
    ImageIcon anIcon = new ImageIcon("any.jpg");  
    // Here's where the problem is, adding more buttons causes them to resize to fit the pane
    for(int i = 0; i < rows*COLS; i++)
      addButton("hi", anIcon);
    Dimension buttonPanelDimension = new Dimension(300,300);
    // Setting the size of the panel does not fix the problem
    panel.setPreferredSize(buttonPanelDimension);
    panel.setSize(buttonPanelDimension);
    panel.setMaximumSize(buttonPanelDimension);
    panel.setMinimumSize(buttonPanelDimension);
    add(panel, BorderLayout.CENTER);
    //Create the scroll pane and add the table to it
    JScrollPane scrollPane = new JScrollPane();
    //Add the scroll pane to this panel.
    panel.add(scrollPane);
   private void addButton(final String label, ImageIcon icon) // does final work?
      JButton button = new JButton(label, icon);
      button.addActionListener(new
        ActionListener()
          public void actionPerformed(ActionEvent event)
            System.out.println("Button label:>" + label);
      panel.add(button);
  public static void main(String[] args)
    //Make sure we have nice window decorations.
    JFrame.setDefaultLookAndFeelDecorated(true);
    //Create and set up the window.
    JFrame frame = new JFrame("ImageThumbnailPanel");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    //Create and set up the content pane.
    ImageThumbnailPanel newContentPane = new ImageThumbnailPanel();
    newContentPane.setOpaque(true);
    frame.setContentPane(newContentPane);
    //Display the window.
    frame.pack();
    frame.setVisible(true);
}

Answer 1

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
class ImageThumbnailPanel extends JPanel
  private JPanel panel;
  private GridLayout buttonLayout = new GridLayout();
  private int rows = 9;
  private static final int COLS = 1;
  public ImageThumbnailPanel()
    setLayout(new BorderLayout());
    panel = new JPanel();
    buttonLayout.setColumns(COLS);
    buttonLayout.setRows(rows);
    panel.setLayout(buttonLayout);
    ImageIcon anIcon = new ImageIcon("any.jpg");
    for(int i = 0; i < rows*COLS; i++)
      addButton("hi", anIcon);
    Dimension buttonPanelDimension = new Dimension(300,300);
    panel.setSize(buttonPanelDimension);
    JScrollPane scrollPane = new JScrollPane(panel);
    scrollPane.setPreferredSize(buttonPanelDimension);
    add(scrollPane);
   private void addButton(final String label, ImageIcon icon)
      JButton button = new JButton(label, icon);
      button.addActionListener(new
        ActionListener()
          public void actionPerformed(ActionEvent event)
            System.out.println("Button label:>" + label);
      panel.add(button);
  public static void main(String[] args)
    JFrame.setDefaultLookAndFeelDecorated(true);
    JFrame frame = new JFrame("ImageThumbnailPanel");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    ImageThumbnailPanel newContentPane = new ImageThumbnailPanel();
    newContentPane.setOpaque(true);
    frame.setContentPane(newContentPane);
    frame.pack();
    frame.setVisible(true);
}