Play with J2ME

This is an example for graphic test in J2ME. There are 2 files that will be created, MyCanvas.java and scrCanvas.java , have a nice try.

MyCanvas.java script

import javax.microedition.midlet.*;

import javax.microedition.lcdui.*;

public class MyCanvas extends MIDlet implements CommandListener{

private Display display = null;

private scrCanvas scrCanvasObj = null;

private Command exit = new Command("EXIT",Command.EXIT,1);

private Command fullScreen = new Command("Full Screen",Command.OK,1);

public MyCanvas()

{

scrCanvasObj = new scrCanvas();

scrCanvasObj.addCommand(exit);

scrCanvasObj.addCommand(fullScreen);

scrCanvasObj.setCommandListener(this);

}

public void startApp() {

if(display == null)

{

display = Display.getDisplay(this);

display.setCurrent(scrCanvasObj);

}

}

public void pauseApp() {

}

public void destroyApp(boolean unconditional) {

}

public void commandAction(Command c,Displayable d)

{

if(c == exit)

{

notifyDestroyed();

destroyApp(true);

}

else if(c == fullScreen)

{

scrCanvasObj.setFullScreenMode(true);

}

}

}

Di bawah ini script scrCanvas.java

import javax.microedition.lcdui.*;

public class scrCanvas extends Canvas implements Runnable{

private int x = 0,y = 0;

private int ax = 1,ay = 1;

public scrCanvas()

{

Thread thread = new Thread(this);

thread.start();

}

private void backgroundHitam(Graphics g)

{

g.setColor(0x000000);

g.fillRect(0, 0, this.getWidth(), this.getHeight());

}

private void kotak(Graphics g)

{

g.setColor(0xff0000);

g.fillRect(x,y, 25,25);

}

private void tulisString(Graphics g)

{

g.setColor(0x00ff00);

g.drawString("Contoh Canvas", 1, 1, Graphics.LEFT | Graphics.TOP);

}

private void rubahPosisiKotak()

{

x+=ax;

y+=ay;

if(x<=0 || x+25>=this.getWidth())

ax*=-1;

if(y<=0 || y+25>=this.getHeight())

ay*=-1;

}

public void paint(Graphics g)

{

backgroundHitam(g);

tulisString(g);

kotak(g);

}

public void run()

{

while(true)

{

repaint();

rubahPosisiKotak();

try

{

Thread.sleep(1);

}

catch(Exception e)

{

e.printStackTrace();

}

}

}

}