Applet ms jvm problem

Question

Hi all,
I'm writing an applet in which I use threads and it's giving me some errors with msjvm I don't understand.
With sun plugins there is no problem and all is ok.
I know that msjvm supports only 1.1.8 and I have to compile with -source 1.4 -target 1.1
I did all my variable volatile, but with ms jvm the process never ends.
My source is this:
//File Prova.java
public class Prova extends Applet implements ActionListener {
public void init()
MakeGUI();
public void actionPerformed(ActionEvent event)
if(event.getSource() == start)
down_result.setText("");
up_result.setText("");
start.setEnabled(false);
cycles = 0;
status = 0;
task = new LongTask(0);
task.start();
checkWork();
task = null;
private void checkWork() {
try {
while ( task.noStopRequested ) {
if(status == 0) {
//set_Stato_Progress();
double b_c = format_double((double)task.current );
double b_t = format_double((double)task.lengthOfTask);
String cur = Double.toString(b_c);
String tot = Double.toString(b_t);
cycles++;
double s_t = (double)task.current * 1000.0 * 8.0;
down_result.setText("prova");
//printThreadName("Down in ");
if(task.done)
stato_progress.setText("First step concluded");
down_result.setText("Fine");
status = 1;
cycles = 0;
else {
//set_Stato_Progress();
double b_c = format_double((double)task.current_up );
double b_t = format_double((double)task.lengthOfTask);
String cur = Double.toString(b_c);
String tot = Double.toString(b_t);
cycles++;
double speed_temp = (double)task.current_up * 1000.0 * 8.0);
double s_t = format_double(speed_temp);
if(task.done_up)
stato_progress.setText("Test concluso");
start.setEnabled(true);
repaint();
task.interrupt();
return;
repaint();
Thread.sleep((long)QUART_SECOND);
catch ( Exception x ) {
stop();
//File LongTask.java
public class LongTask extends Thread {
public volatile boolean noStopRequested;
private final Object pauseLock = new Object();
private boolean paused;
public volatile int lengthOfTask;
public volatile int current = 0;
public volatile boolean done = false;
public boolean canceled = false;
public String statMessage;
public volatile long duration;
public volatile double speed_down;
public volatile long duration_up;
public volatile double speed_up;
public volatile int current_up = 0;
public volatile boolean done_up = false;
private byte [] image_byte;
static int DEFAULT_DOWN_SIZE = 2097152;
private void printThreadName(String prefix) {
String name = Thread.currentThread().getName();
System.out.println(prefix + name);
public LongTask(int tipo_conn) {      
     lengthOfTask = DEFAULT_DOWN_SIZE;
paused = true;
noStopRequested = true;
current = 0;
duration = 0;
speed_down = 0;
duration_up = 0;
speed_up = 0;
current_up = 0;
done = false;
done_up = false;
canceled = false;
statMessage = null;
image_byte = null;
paused = false;
public void stopThread() {
paused = true;
public void run() {
Socket sock = null;
InetSocketAddress isa = null;
InputStream instream = null;
ByteArrayOutputStream tempBuffer;
int numBytesRead = 0;
byte [] buffer;
try {
while (noStopRequested) {
waitWhilePaused();
//My first operation
done = true;
//My second operation
done_up = true;
paused = true;
catch (MalformedURLException e) {
System.out.println("[Errore] " + e.getMessage());
Thread.currentThread().interrupt();
catch(UnknownHostException e) {
System.out.println("[Errore] " + e.getMessage());
Thread.currentThread().interrupt();
catch (IOException e) {
System.out.println("[Errore] " + e.getMessage());
Thread.currentThread().interrupt();
catch(Exception e) {
e.printStackTrace();
speed_down = 0.0;
speed_up = 0.0;
Thread.currentThread().interrupt();
private void setPaused(boolean newPauseState) {
synchronized ( pauseLock ) {
if ( paused != newPauseState ) {
paused = newPauseState;
pauseLock.notifyAll();
private void waitWhilePaused() throws InterruptedException {
synchronized ( pauseLock ) {
while ( paused ) {
pauseLock.wait();
I can't explain me where is my error.
Running my applet on msjvm, it semms that LongTask never ends and never update the volatile variables.
Any hints?
Thanks for the support
Laura

Answer 1

Solved.
The ms jvm support 1.1* and then there is no Double.parseDouble.....
You have to use Double.valueOf(....).doubleValue();
Bye
Laura