Nokia 9210 Service Manual

How to develop Java

TM

 Applications for the Nokia 9210 Communicator

Version 1.1

Copyright © 2001. Nokia Mobile phones. All rights reserved.

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where the c:\jdk1.1.8\lib\classes\ folder contains Symbian classes. More information about

classpath issues with the emulator can be found in the SDK documentation:

Crystal V6 Edition for Java -> Java Developer's Guide for Crystal -> Java Development -> The
default classpath.

Below is the source code of the amazing Hello World application. The code should be copied to
the file Helloworld.java and compiled with javac.exe.

import

com.symbian.devnet.crystal.awt.*;

import

com.symbian.epoc.awt.*;

import

java.awt.*;

class Helloworld extends CFrame implements CBAListener
{

private static GridPanel panel = new GridPanel();
private CBAHandler cba;

static final String TITLE = "Hello World";
final static int CLOSE_BUTTON = EikCommandButtonGroup.BUTTON4;

public static void main( String args[] )
{

new Helloworld();

}

public Helloworld()
{

setTitle(TITLE);
cba = new CBAHandler( this );
cba.setText( CLOSE_BUTTON, "Close" );
cba.activate();

Font font = new Font("SansSerif",0,30);
Label label = new Label("Hello World!!!");
label.setFont(font);

panel.add(label,0,1);
add(panel);

show();

}

public void cbaActionPerformed( CBAEvent e )
{

switch ( e.getID() )
{

case CLOSE_BUTTON:
shutDown();
break;

}

}

}

Certain procedures must be followed to make the Hello World application visible in the emulator
and the target machine.  One must use the tool applications included with the SDK. The AIF
Builder tool writes certain files needed for the Symbian operating system and the makesis.exe