Applet hangs while using JOptionPane.xxx()

[Basit56]

Hi to all,
Hope you all will be fine. I have an applet of voicerecorder. The problem is when you start to record the sound it works fine.Now i want to put a condition in it, that sound can not be recorded more than 3 minutes for this, in the initial step i put the condition like

if(minutes > 3){
JOptionPane.showMessageDialog(null, "Yor are not allowed to record more than 3 minutes", "Warning",JOptionPane.WARNING_MESSAGE);
}

But after executing this it shows a dialog box with nothing in it and after showing a long arror messages in the NetBeans output pane and when i click the exit button then the applet exits.The code snippet is as follws that do this part

public void start() {
thread = new Thread(this);
thread.setName("SamplingGraph");
thread.start();
seconds = 0;
minutes = 0;
}

public void stop() {
if (thread != null) {
thread.interrupt();
}
thread = null;
}

public void run() {
seconds = 0;
minutes = 0;
while (thread != null) {
if ((playback.line != null) && (playback.line.isOpen()) ) {

int milliseconds = (int)(capture.line.getMicrosecondPosition() / 1000);
seconds =(int) (milliseconds / 1000.0);
minutes = (int)((milliseconds / 1000.0) / 60 );


} else if ( (capture.line != null) && (capture.line.isActive()) ) {

int milliseconds = (int)(capture.line.getMicrosecondPosition() / 1000);
seconds =(int) (milliseconds / 1000.0);
minutes = (int)((milliseconds / 1000.0) / 60 );
}

try { thread.sleep(100); } catch (Exception e) { break; }

repaint();

while ((capture.line != null && !capture.line.isActive()) ||
(playback.line != null && !playback.line.isOpen()))
{
try { thread.sleep(10); } catch (Exception e) { break; }
}
}
seconds = 0;
minutes = 0;
repaint();
}

Then the part where i modify the things and things start going wrong
public void paint(Graphics g) {

            Dimension d = getSize();
            int w = d.width;
            int h = d.height;
            int INFOPAD = 15;

            Graphics2D g2 = (Graphics2D) g;
            g2.setBackground(getBackground());
            g2.clearRect(0, 0, w, h);
            g2.setColor(Color.white);
            g2.fillRect(0, h-INFOPAD, w, INFOPAD);

            if (errStr != null) {
                g2.setColor(jfcBlue);
                g2.setFont(new Font("serif", Font.BOLD, 18));
                g2.drawString("ERROR", 5, 20);
                AttributedString as = new AttributedString(errStr);
                as.addAttribute(TextAttribute.FONT, font12, 0, errStr.length());
                AttributedCharacterIterator aci = as.getIterator();
                FontRenderContext frc = g2.getFontRenderContext();
LineBreakMeasurer lbm = new LineBreakMeasurer(aci, frc);
float x = 5, y = 25;
lbm.setPosition(0);
while (lbm.getPosition() < errStr.length()) {
TextLayout tl = lbm.nextLayout(w-x-5);
if (!tl.isLeftToRight()) {
x = w - tl.getAdvance();
}
tl.draw(g2, x, y += tl.getAscent());
y += tl.getDescent() + tl.getLeading();
}
} else if (capture.thread != null) {
g2.setColor(Color.black);
g2.setFont(font12);
g2.drawString("Length: " + String.valueOf( minutes) + " min" + " : " + String.valueOf(seconds) + " sec", 3, h-4);
if(minutes > 3){
JOptionPane.showMessageDialog(null, "Yor are not allowed to record more than three minutes", "Warning",JOptionPane.WARNING_MESSAGE);
capture.stop();
fileName = " Press Done when complete";
samplingGraph.stop();
playButton.setEnabled(true);
pauseButton.setEnabled(false);
doneButton.setEnabled(true);
recordButton.setText("Record");
}


} else {
g2.setColor(Color.black);
g2.setFont(font12);
g2.drawString( fileName , 3, h-4);
// g2.drawString("File has been recorded." , 3, h-4);

if (audioInputStream != null) {
// .. render sampling graph ..
g2.setColor(jfcBlue);
for (int i = 1; i < lines.size(); i++) {
g2.draw((Line2D) lines.get(i));
}

// .. draw current position ..
if (seconds != 0) {
double loc = seconds/duration*w;
g2.setColor(pink);
g2.setStroke(new BasicStroke(3));
g2.draw(new Line2D.Double(loc, 0, loc, h-INFOPAD-2));
}
}
}

Please tell me where i m wrong.I attach file but its size exceeds the size limit so i m unable to attach it
Thanks in advance