public class applet-nervous-text extends Applet implements Runnable, MouseListener {
      String banner;                // The text to be displayed
      char bannerChars[];                // The same text as an array of characters
      char attributes[];                // Character attributes ('^' for superscript)
      Thread runner = null;        // The thread that is displaying the text
      boolean threadSuspended;        // True when thread suspended (via mouse click)
  
      static final int REGULAR_WD = 26;
      static final int REGULAR_HT = 36;
      static final int SMALL_WD = 17;
      static final int SMALL_HT = 24;
  
      Font regularFont = new Font("Serif", Font.BOLD, REGULAR_HT);
      Font smallFont = new Font("Serif", Font.BOLD, SMALL_HT);
  
      public void init() {
          banner = getParameter("text");
          if (banner == null) {
              banner = "HotJava";
          }
  
          int bannerLength = banner.length();
          StringBuffer bc = new StringBuffer(bannerLength);
          StringBuffer attrs = new StringBuffer(bannerLength);
          int wd = 0;
          for (int i = 0; i < bannerLength; i++) {
              char c = banner.charAt(i);
              char a = 0;
              if (c == '^') {
                  i++;
                  if (i < bannerLength) {
                      c = banner.charAt(i);
                      a = '^';
                      wd += SMALL_WD - REGULAR_WD;
                  } else {
                      break;
                  }
              }
              bc.append(c);
              attrs.append(a);
              wd += REGULAR_WD;
          }
  
          bannerLength = bc.length();
          bannerChars =  new char[bannerLength];
          attributes = new char[bannerLength];
          bc.getChars(0, bannerLength, bannerChars, 0);
          attrs.getChars(0, bannerLength, attributes, 0);
  
          threadSuspended = false;
          resize(wd + 10, 50);
          addMouseListener(this);
      }
  
      public void destroy() {
          removeMouseListener(this);
      }
  
      public void start() {
          runner = new Thread(this);
          runner.start();
      }
  
      public synchronized void stop() {
          runner = null;
          if (threadSuspended) {
              threadSuspended = false;
              notify();
          }
      }
  
      public void run() {
          Thread me = Thread.currentThread();
          while (runner == me) {
              try {
                  Thread.sleep(100);
                  synchronized(this) {
                      while (threadSuspended) {
                          wait();
                      }
                  }
              } catch (InterruptedException e){
              }
              repaint();
          }
      }
  
      public void paint(Graphics g) {
          int length = bannerChars.length;
          for (int i = 0, x = 0; i < length; i++) {
              int wd, ht;
              if (attributes[i] == '^') {
                  wd = SMALL_WD;
                  ht = SMALL_HT;
                  g.setFont(smallFont);
              } else {
                  wd = REGULAR_WD;
                  ht = REGULAR_HT;
                  g.setFont(regularFont);
              }
              int px = (int) (10 * Math.random() + x);
              int py = (int) (10 * Math.random() + ht);
              g.drawChars(bannerChars, i, 1, px, py);
              x += wd;
          }
      }
  
      public synchronized void mousePressed(MouseEvent e) {
          e.consume();
          threadSuspended = !threadSuspended;
          if (!threadSuspended)
              notify();
      }
  
      public void mouseReleased(MouseEvent e) {
      }
  
      public void mouseEntered(MouseEvent e) {
      }
  
      public void mouseExited(MouseEvent e) {
      }
  
      public void mouseClicked(MouseEvent e) {
      }
  
      public String getAppletInfo() {
          return "Title: NervousText\nAuthor: Daniel Wyszynski\nDisplays a text banner that jitters.";
      }
  
      public String[][] getParameterInfo() {
          String pinfo[][] = {
              {"text", "string", "Text to display"},
          };
          return pinfo;
      }
  }