Slide 7.f: Using Java ME

Slide 7.e: Java ME (Java Platform, Micro Edition)
Slide 8.a: Lisp
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Using Java ME (Java Platform, Micro Edition)

Download Java Platform Micro, Edition Software Development Kit (SDK) 3.0 .

Run Java ME SDK by selecting

   Start ⇒ Programs ⇒ Java ME Platform SDK 3.0
         ⇒ Java ME Platform SDK 3.0

Create a new project by selecting an MIDP application:

Pick a project name such as Ex1 and location such as C:\Java ME\:

Select the default platform:

Default HelloMIDlet.java is displayed on the window:

You may check the result of the HelloMIDlet.java by selecting Run ⇒ Build:

and Run ⇒ Run:

Create your own project by performing the following tasks, for example:

In the directory C:\Java ME\JavaMESDKProjects\Ex1\nbproject, change the following line in the file project from

   manifest.midlets=MIDlet-1: HelloMIDlet, , hello.HelloMIDlet\n
                                   ⇓
   manifest.midlets=MIDlet-1: PacerMIDlet, , pacer.PacerMIDlet\n

In the directory C:\Java ME\JavaMESDKProjects\Ex1\src, change the directory name from
```
   hello ⇒ pacer
```
In the directory C:\Java ME\JavaMESDKProjects\Ex1\src\pacer, change the file name from
```
   HelloMIDlet.java ⇒ PacerMIDlet.java
```

Write your own program by modifying the program PacerMIDlet.java as follows, for example:

C:\Java ME\JavaMESDKProjects\Ex1\src\pacer\PacerMIDlet.java

 package pacer;

 import  javax.microedition.midlet.*;
 import  javax.microedition.lcdui.*;

 public class  PacerMIDlet
    extends  MIDlet  implements  CommandListener {

   private Command  exitCommand;       // The exit command
   private Display  display;           // The display for this MIDlet

   public PacerMIDlet( ) {
     display = Display.getDisplay( this );
     exitCommand = new Command( "Exit", Command.EXIT, 0 );
   }

   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 ) {
   }

   public void  commandAction( Command c, Displayable s ) {
     if ( c == exitCommand ) {
       destroyApp( false );
       notifyDestroyed( );
     }
   }
 }

 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 );

     for ( int x = 0; x < w; x += 10 )
       g.drawLine( 0, w - x, x, 0 );

     int z = 50;
     g.drawRect( z, z, 20, 20 );
     z += 20;
     g.fillRoundRect( z, z, 20, 20, 5, 5 );
     z += 20;
     g.drawArc( z, z, 20, 20, 0, 360 );
   }
 }

^†For how to create Mobile Information Device Profile (MIDP) applications with the Java ME SDK, check Java ME Documentation.

Rebuild and run the project: