Java Tutorial/J2ME/Rectangle

Draw rectangle

   <source lang="java">

import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Graphics; import javax.microedition.midlet.MIDlet; public class DrawRectGraphicsMIDletStrokeStyle extends MIDlet {

 private Display display;
 protected void startApp() {
   Canvas canvas = new LineCanvas();
   display = Display.getDisplay(this);
   display.setCurrent(canvas);
 }
 protected void pauseApp() {
 }
 protected void destroyApp(boolean unconditional) {
 }

} class LineCanvas extends Canvas {

 public void paint(Graphics g) {
   int width = getWidth();
   int height = getHeight();
   g.setColor(0);
   g.setStrokeStyle(Graphics.SOLID);
       g.drawRect(width/4, 0, width/2, height/4);
 }

}</source>

Fill a rectangle, and a round rectangle

   <source lang="java">

import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.Graphics; import javax.microedition.midlet.MIDlet; public class J2MEFilledRectangleExample extends MIDlet {

 private Display display;
 private MyCanvas canvas;
 public J2MEFilledRectangleExample() {
   display = Display.getDisplay(this);
   canvas = new MyCanvas(this);
 }
 protected void startApp() {
   display.setCurrent(canvas);
 }
 protected void pauseApp() {
 }
 protected void destroyApp(boolean unconditional) {
 }
 public void exitMIDlet() {
   destroyApp(true);
   notifyDestroyed();
 }

} class MyCanvas extends Canvas implements CommandListener {

 private Command exit;
 private J2MEFilledRectangleExample filledRectangleExample;
 public MyCanvas(J2MEFilledRectangleExample filledRectangleExample) {
   this.filledRectangleExample = filledRectangleExample;
   exit = new Command("Exit", Command.EXIT, 1);
   addCommand(exit);
   setCommandListener(this);
 }
 protected void paint(Graphics graphics) {
   graphics.setColor(255, 255, 255);
   graphics.fillRect(0, 0, getWidth(), getHeight());
   graphics.setColor(0, 0, 255);
   graphics.fillRect(2, 2, 20, 20);
   graphics.fillRoundRect(20, 20, 60, 60, 15, 45);
 }
 public void commandAction(Command command, Displayable displayable) {
   if (command == exit) {
     filledRectangleExample.exitMIDlet();
   }
 }

}</source>

Fill rectangle

   <source lang="java">

import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Graphics; import javax.microedition.midlet.MIDlet; public class FillRectGraphicsMIDlet extends MIDlet {

 private Display display;
 protected void startApp() {
   Canvas canvas = new LineCanvas();
   display = Display.getDisplay(this);
   display.setCurrent(canvas);
 }
 protected void pauseApp() {
 }
 protected void destroyApp(boolean unconditional) {
 }

} class LineCanvas extends Canvas {

 public void paint(Graphics g) {
   int width = getWidth();
   int height = getHeight();
   g.setColor(0);
   g.fillRect(0, 0, width, height);  
   }

}</source>

Fill Round Rectangle

   <source lang="java">

import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.Graphics; import javax.microedition.midlet.MIDlet; public class J2MEPacer extends MIDlet {

 public void startApp() {
   Displayable d = new PacerCanvas();
   d.addCommand(new Command("Exit", Command.EXIT, 0));
   d.setCommandListener(new CommandListener() {
     public void commandAction(Command c, Displayable s) {
       notifyDestroyed();
     }
   });
   Display.getDisplay(this).setCurrent(d);
 }
 public void pauseApp() {
 }
 public void destroyApp(boolean unconditional) {
 }

} class PacerCanvas extends Canvas {

 public void paint(Graphics g) {
   int w = getWidth();
   int h = getHeight();
   g.setColor(0xffffff);
   g.fillRect(0, 0, w, h);
   g.setColor(0x000000);
   g.drawRect(12, 12, 20, 20);
   g.fillRoundRect(33, 33, 20, 20, 5, 5);
   g.drawArc(8, 88, 20, 20, 0, 360);
 }

}</source>