Java Source Code for the Jumping Words Example
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import java.awt.*;
import java.util.StringTokenizer;
public class jumping extends java.applet.Applet implements Runnable {
Thread blinker;
String message;
Font font;
int speed;
public void init() {
font = new java.awt.Font("TimesRoman", Font.PLAIN, 24);
String att = getParameter("speed");
speed = (att == null) ? 400 : (1000 / Integer.valueOf(att).intValue());
att = getParameter("message");
message = (att == null) ? "Blink" : att;
}
public void paint(Graphics g) {
setBackground(new Color(200, 200, 100));
int x = 0, y = font.getSize(), space;
int red = (int)(Math.random() * 50);
int green = (int)(Math.random() * 50);
int blue = (int)(Math.random() * 256);
Dimension d = size();
g.setColor(Color.black);
g.setFont(font);
FontMetrics fm = g.getFontMetrics();
space = fm.stringWidth(" ");
for (StringTokenizer t = new StringTokenizer(message) ; t.hasMoreTokens() ; ) {
String word = t.nextToken();
int w = fm.stringWidth(word) + space;
if (x + w > d.width) {
x = 0;
y += font.getSize();
}
if (Math.random() < 0.5) {
g.setColor(new java.awt.Color((red + y * 30) % 256, (green + x / 3) % 256, blue));
} else {
g.setColor(getBackground());
}
g.drawString(word, x, y);
x += w;
}
}
public void start() {
blinker = new Thread(this);
blinker.start();
}
public void stop() {
blinker.stop();
}
public void run() {
while (true) {
try {Thread.currentThread().sleep(speed);} catch (InterruptedException e){}
repaint();
}
}
}
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