import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Graphics;
import javax.microedition.midlet.MIDlet;
public class Plot2DMIDlet extends MIDlet implements CommandListener {
private Command exitCommand;
Display display;
int[] line1 = { 80, 20, 60, 70, 50, 20 };
int[] line2 = { 20, 10, 50, 60, 90, 60 };
public void startApp() {
int maxX = 10;
int maxY = 100;
Display display = Display.getDisplay(this);
Displayable d = new Plot2DCanvas(line1, line2, maxX, maxY);
exitCommand = new Command("Exit", Command.EXIT, 1);
d.addCommand(exitCommand);
d.setCommandListener(this);
display.setCurrent(d);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
}
public void commandAction(Command c, Displayable s) {
notifyDestroyed();
}
}
class Plot2DCanvas extends Canvas {
int line1[];
int line2[];
int maxX, maxY;
Plot2DCanvas(int[] line1, int[] line2, int maxX, int maxY) {
this.line1 = line1;
this.line2 = line2;
this.maxX = maxX;
this.maxY = maxY;
}
public void paint(Graphics g) {
int width = this.getWidth();
int height = this.getHeight();
g.setGrayScale(0);
g.drawLine(0, height, 0, 0);
g.drawLine(0, height - 1, width, height - 1);
int deltaX = width / maxX;
int deltaY = height / maxY;
g.setStrokeStyle(Graphics.DOTTED);
for (int i = 0; i < line1.length - 1; i++) {
g.drawLine(deltaX * i, height - deltaY * line1[i], deltaX * (i + 1), height - deltaY
* line1[i + 1]);
}
}
}