How can I change where an applet focuses its view

I'm writing a scrolling marquee applet and in order to scroll up, out of sight or scroll Left out of sight, I have to be able to draw my strings with negative x & y values which seem to not be allowed.
I figure if I draw my marquee with the upper left corner located at around 300, 50, (instead of 0,0 ) I won't have to worry about drawing to negative coordinates.
Is there anyway to set the applet so that when it opens in a browser, the upper left hand corner of the visible applet would begin at 300, 50 instead of 0, 0, by default?
Charlene English

when the text is at 0,0... it is still in view of the user. 0,0 is, so far, the extreme upper right hand corner of the scrolling marquee. If I wanted the text to scroll off screen to the left, I would have to start assigning negative values to the x component of drawString. This is the reason I want to offset the whole marquee by 300, 50. My Marquee is 350, 30 in size, so if I offset my Marquee without being able to control the view of the applet, I'd have an applet on my page (650, 80) in size and the marquee would be in the lower right hand corner.
What I'm shooting for is an applet that is (350, 30) in size with it's upper left hand corner located at 300, 50.
-Charlene

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how could I modify the applet to display (plot) several cycles of the audio signal instead of the elliptical shape. The amplitude and period of the waveform should change in accordance with the moving sliders
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import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class JazzMachine extends Applet
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// Line separator char
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// Value range
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private byte[] mu;
// the audio stream
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private Graphics graph;
// dimensions of the graphic ball
private int ovalX, ovalY, ovalW, ovalH;
// color of the graphic ball
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// default font size
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// hyperlink objects
private Panel linkPanel;
private Label labelNS;
private Color inactiveLinkColor = Color.yellow;
private Color activeLinkColor = Color.white;
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private Font activeLinkFont = new Font("Dialog", Font.ITALIC, fontSize);
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// standard background color for the graphic ball area
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// maximum life time for an unchanged sound (10 seconds)
private long fixedTime = 10000;
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Thread runner;
//                             Constructors
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//                                Methods
public void init() {
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      labelNS.setForeground(inactiveLinkColor);
      labelNS.setFont(inactiveLinkFont);
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private void switchAudio(boolean b) {
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    if ((b) && (! audioOn)) {
      try {
        sun.audio.AudioPlayer.player.start(soundStream);
      catch(Exception e) { }
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    // switch audio to OFF if b=false and audio is ON
    if ((! b) && (audioOn)) {
      try {
        sun.audio.AudioPlayer.player.stop(soundStream);
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private void getChanges() {
    // create new sound wave
    mu = getWave(frequency, amplitude);
    // show new frequency value
    if (showFreq)
      labelValueFreq.setText((new Integer(soundFrequency)).toString() + " Hz");
    // shut up !
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    try {
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    catch(Exception e) { }
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    ovalX = (int)((cw - ovalW) / 2);
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//                               Thread
public void start() {
    // create thread
    if (runner == null) {
      runner = new Thread(this);
      runner.start();
public void run() {
    // infinite loop
    while (true) {
      // Volume or Frequency has changed ?
      if (changed)
        this.getChanges();
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      // let the children sleep. Shut up if inactive during more
      // than the fixed time.
      if (System.currentTimeMillis() - startTime > fixedTime)
        switchAudio(false);
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      try { Thread.sleep(100); }
      catch (InterruptedException e) { }
public void stop() {
    this.cleanup();
public void destroy() {
    this.cleanup();
private synchronized void cleanup() {
    // shut up !
    switchAudio(false);
    // kill the runner thread
    if (runner != null) {
      try {
        runner.stop();
        runner.join();
        runner = null;
      catch(Exception e) { }
//                     AdjustmentListener Interface
public void adjustmentValueChanged(AdjustmentEvent e) {
    Object source = e.getSource();
    // Volume range : 0 - 10000
    // ! Scrollbar value range is inverted.
    // ! 100 = multiplier coefficient.
    if (source == barVolume) {
      amplitude = (MAX_AMPL - barVolume.getValue()) * amplMultiplier;
      changed = true;
    // Frequency range : 97 - 3591 Hz
    // ! Scrollbar value range represents a logarithmic function.
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    else if (source == barFreq) {
      freqValue = barFreq.getValue();
      frequency = (int)Math.pow(1.2d, (double)(freqValue + 250) / 10.0);
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//                     MouseListener Interface
public void mouseClicked(MouseEvent e) {
public void mouseEntered(MouseEvent e) {
    // text color rollover
    labelNS.setForeground(activeLinkColor);
    labelNS.setFont(activeLinkFont);
    showStatus("Visit Neural Semantics");
public void mouseExited(MouseEvent e) {
    // text color rollover
    labelNS.setForeground(inactiveLinkColor);
    labelNS.setFont(inactiveLinkFont);
    showStatus("");
public void mousePressed(MouseEvent e) {
    try {
      java.net.URL url = new java.net.URL("http://www.neuralsemantics.com/");
      AppletContext ac = getAppletContext();
      if (ac != null)
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public void mouseReleased(MouseEvent e) {
//                              Painting
public void update(Graphics g) {
    Graphics canvasGraph = canvas.getGraphics();
    if (img == null) {
      // get canvas dimensions
      cw = canvas.getSize().width;
      ch = canvas.getSize().height;
      // initialize offscreen image
      img = createImage(cw, ch);
      graph = img.getGraphics();
    // offscreen painting
    graph.setColor(bgColor);
    graph.fillRect(0, 0, cw, ch);
    graph.setColor(ovalColor);
    graph.fillOval(ovalX, ovalY, ovalW, ovalH);
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    if (canvasGraph != null) {
      canvasGraph.drawImage(img, 0, 0, canvas);
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//                          Sound processing
// Creates a sound wave from scratch, using predefined frequency
// and amplitude.
private byte[] getWave(int freq, int ampl) {
    int lin;
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    // !! change this to multiple periods if you need more precision !!
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      // calculate PCM sample value
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    else if (lin < 96)
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    else if (lin < 224)
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    else if (lin < 480)
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    else if (lin < 992)
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    else if (lin < 8160)
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//                             Applet info
public String getAppletInfo() {
    String s = "The jazz machine" + LSEP + LSEP +
               "A music synthetizer applet" + LSEP +
               "Copyright (c) Neural Semantics, 2000-2002" + LSEP + LSEP +
               "Home page : http://www.neuralsemantics.com/";
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private void setAppletParams() {
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    if (param != null) {
      try {
        fontSize = Integer.valueOf(param).intValue();
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private Color changeColor(Color c, String s) {
    if (s != null) {
      try {
        if (s.charAt(0) == '#')
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        else
          c = new Color(Integer.valueOf(s).intValue());
      catch (NumberFormatException e) { e.printStackTrace(); }
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}thanks LIZ
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