Problem with AWT/Swing code

Wed Oct 15 11:32:00 GMT 2008

Hi everyone,
I'm doing some testing with AWT/Swing applications compiled with gcj 4.4 (which is using classpath 0.97.2).
I'm having some troubles with the following code; it does not show
the JComponent inside the JFrame (I've tried both on x86 and arm).
This code runs fine if compiled with OpenJDK, so I guess that this issue is more related to gcj rather then classpath.
Any thoughts or ideas?
Thank you
Francesco
Code:
import java.awt.BorderLayout;
import javax.swing.DefaultListModel;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import javax.swing.SwingUtilities;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
public class MainPanel extends JPanel implements ListSelectionListener {
 static final int NUM_ROWS = 500;
 JList list;
 JLabel lblSelection;
 DefaultListModel listModel;
 int startRow = 0;
 long startTime = 0;
 Runnable r = new Runnable() {
 public void run() {
 long deltaTime = System.currentTimeMillis() - startTime;
 for (int i=startRow; i<NUM_ROWS; i++) {
 listModel.set(i, ""+deltaTime);
 }
 startRow++;
 startTime = System.currentTimeMillis();
 SwingUtilities.invokeLater(r);
 }
 };
 public MainPanel() {
 super(new BorderLayout());
 listModel = new DefaultListModel();
 for (int i=0; i<NUM_ROWS; i++) {
 listModel.addElement("Element "+i);
 }
 //Create the list and put it in a scroll pane.
 list = new JList(listModel);
 list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
 list.setSelectedIndex(0);
 list.addListSelectionListener(this);
 list.setVisibleRowCount(5);
 JScrollPane listScrollPane = new JScrollPane(list);
 lblSelection = new JLabel(" ");
 add(lblSelection, BorderLayout.SOUTH);
 add(listScrollPane, BorderLayout.CENTER);
 // t.start();
 startTime = System.currentTimeMillis();
 SwingUtilities.invokeLater(r);
 }
 public void valueChanged(ListSelectionEvent e) {
 if (e.getValueIsAdjusting() == false) {
 if (list.getSelectedIndex() == -1) {
 //No selection
 lblSelection.setText("");
 } else {
 //Selection
 lblSelection.setText("Item selected: "+list.getSelectedIndex());
 }
 }
 }
 public static void main(String[] args) {
 //Create and set up the window.
 JFrame frame = new JFrame("TestUI #1");
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 //Create and set up the content pane.
 JComponent newContentPane = new MainPanel();
 newContentPane.setOpaque(true); //content panes must be opaque
 frame.setContentPane(newContentPane);
 //Display the window.
 frame.setBounds(10, 10, 500, 400);
 frame.setVisible(true);
 }
}