URGENT:problem with memory using swing component

Question

We use Java SDK 1.4.0-b92 on a Sun Blade Machine with Solaris 8 Operating System.
We developed a software with a GUI (JFame, JInternalFrame) which have to be refreshed in precise moments and any time we do it there is a big loss of memory(not the Java Virtual Machine Memory but the system memory, see it with the command "vmstat"). It seems that memory isn't released even if we close one or more of the JInternalFrame/JFrame.
This is a part of our example code which refresh some JTextArea every ten seconds,with the content of a text File called "text.txt" :
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.border.*;
import java.util.*;
public class MainFrame extends JFrame {
static JDesktopPane desktop = new JDesktopPane();
JMenuBar menuBar = new JMenuBar();
JMenu menu = new JMenu();
JMenuItem aggiungi = new JMenuItem();
int openFrameCount = 0;
public MainFrame (){
try{
desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
desktop.setBorder(BorderFactory.createLoweredBevelBorder());
this.setContentPane(desktop);
Dimension screenSize= Toolkit.getDefaultToolkit().getScreenSize();
this.setBounds(0, 0, screenSize.width, screenSize.height);
this.setTitle("Main Frame Prova");
this.setLocation(0,0);
this.setVisible(true);
menu.setText("apri frame");
aggiungi.setText("Apri");
aggiungi.addActionListener(new ActionListener () {
public void actionPerformed(ActionEvent e){
createFrame();
menu.add(aggiungi);
menuBar.add(menu);
this.setJMenuBar(menuBar);
catch (Exception e) {e.printStackTrace();}
private void createFrame (){
try{
NsJInternalFrame frame = new NsJInternalFrame("Frame Interno", true, true, true, true);
openFrameCount++;
System.out.println("Frame aperti: "+openFrameCount);
frame.setVisible(true);
desktop.add(frame);
frame.setSelected(true);
frame.setPreferredSize(new Dimension(400,500));
frame.setSize(new Dimension(400,500));
finalize();
catch (Exception e) {e.printStackTrace();}
catch (Throwable t) {t.printStackTrace();}
protected void processWindowEvent (WindowEvent e){
try{
super.processWindowEvent(e);
if (e.getID()== WindowEvent.WINDOW_CLOSING) {
finalize();
System.exit(0);
catch (Exception ex) {ex.printStackTrace();}
catch (Throwable t) {t.printStackTrace();}
public static void main (String argv[]){
try {
UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
MainFrame mf = new MainFrame();
while (true){
Thread.sleep(10000);
aggiornaTesto();
Runtime run = Runtime.getRuntime();
System.out.println("***********************************************************");
System.out.println("* Memoria Totale "+run.totalMemory()/1000+" *");
System.out.println("* Memoria Massima occupabile "+run.maxMemory()/1000+" *");
System.out.println("* *");
System.out.println("* --------------------------------------------------------- *");
System.out.println("* *");
System.out.println("* Memoria Libera "+run.freeMemory()/1000+" *");
System.out.println("* *");
System.out.println("***********************************************************");
System.runFinalization();
System.gc();
catch (Exception e) {e.printStackTrace();}
private static void aggiornaTesto(){
JInternalFrame[] frameAperti = desktop.getAllFrames();
for (int i=0; i<frameAperti.length; i++)
((NsJInternalFrame)frameAperti).inizializeText();
System.out.println("----- "+new Date()+" / Aggiornato testo------");
System.runFinalization();
System.gc();
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.border.*;
import java.io.*;
public class NsJInternalFrame extends JInternalFrame {
JTextArea textArea=new JTextArea();
public NsJInternalFrame (String title, boolean resizable, boolean closeable, boolean maximizable, boolean iconifiable){
super (title, resizable, closeable, maximizable, iconifiable);
disableEvents (AWTEvent.WINDOW_EVENT_MASK);
JScrollPane scroll;
scroll=new JScrollPane(textArea);
this.setContentPane(scroll);
this.setDefaultCloseOperation(JInternalFrame.DISPOSE_ON_CLOSE);
inizializeText();
public void inizializeText(){
try{
RandomAccessFile raf = new RandomAccessFile("text.txt", "r");
String text = new String(), line = new String();
while (true) {
line = raf.readLine();
if (line==null) break;
text= text+line;
textArea.setText(text);
finalize();
raf.close();
catch (Exception e) {e.printStackTrace();}
catch (Throwable t) {t.printStackTrace();}
public void dispose (){
try{
finalize();
super.dispose();
catch (Exception e) {e.printStackTrace();}
catch (Throwable t) {t.printStackTrace();}
text.txt
HELLO HELLO HELLO
Help Us Please!!
[email protected]
[email protected]

Answer 1

Yes I'm still following the thread.
Like i said i only have ovi maps running with PhoNetInfo and even today i tested it again. I managed by changing some settings to get 50MB of free RAM when the phone is idle.
I changed the amount of allowed RAM to be used by ovi maps to the minimum (10%). This time i had 40MB of free ram before calculating the root (again more or less 600km) without tolls and the fastest root. i continued with PhoNetInfo on and following the value of free RAM and they kept falling till i get again the low memory error.
I tried then a "solution" that i got from nokia that stated to change the configuration of the internet to online, and it worked perfectly. But i don't think this is a solution since i can't have my phone always connected to the internet. I don't know is where i can suggest that nokia try to solve this problem but already sent an email to the client support stating this.
I don't think i can install a later version of ovimaps since it comes pre-installed on the phone and i don't see where i can uninstall it and where to find the earlier versions.
But thanks for the reply,