import javax.microedition.midlet.MIDlet;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;


public class Graph extends Canvas {
 
  private Display display;
  private Graph graph;


 public void paint(Graphics g) {
 int width = g.getClipWidth();
 int height = g.getClipHeight();
 g.setColor(255,255,0);
 g.fillRect(0,0,width,height);
 g.setColor(0,0,0);
 g.drawRect(0,0,width - 1,height - 1);
 g.drawLine(width/2,0,width/2,height);
 g.drawLine(0,height/2,width,height/2);
 g.translate(width/2,height/2);
 g.setColor(255,0,0);
 for(int x = - width/2;x < width/2;x++) {
 int y = - x * x/40;
 g.drawLine(x,y,x,y);
 }
 }
 public void startApp() {
 Graph graph = new Graph();
 display = Display.getDisplay(this);
 display.setCurrent(graph);
 }

 public void pauseApp() {
 }

 public void destroyApp(boolean unconditional) {
 }
}