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Old 05-28-2008, 10:46 AM   #1 (permalink)
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Default uncaught exception java.lang.nullpointer exception

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hi all,

i am getting a uncaught exception java.lang.nullpointer exception as soon as i try to launch my application.

Following is my code for the reference

import java.io.IOException;
import java.io.InputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.InputConnection;
import javax.microedition.io.file.FileConnection;
import javax.microedition.lcdui.Display;
import javax.microedition.media.Manager;
import javax.microedition.media.Player;
import javax.microedition.media.PlayerListener;
import javax.microedition.media.control.VideoControl;
import javax.microedition.media.control.VolumeControl;
import javax.microedition.midlet.MIDlet;


public class GSMmidlet extends MIDlet implements PlayerListener,Runnable {

Display display;
GSMCanvas canvas;
private Player player;
private VideoControl vc;
private VolumeControl volume;
public void destroyApp(boolean unconditional) {
destroyApp(true);
notifyDestroyed();
}

public void pauseApp() {


}

public void startApp() {
display=Display.getDisplay(this);
canvas=new GSMCanvas();
display.setCurrent(canvas) ;
}
public void start()
{


Thread t = new Thread(this);
t.start();
}


public void run()
{
if(canvas.index==0)
play1();
else
play2();
}
public void play1()
{
try
{
InputStream is=getClass().getResourceAsStream("/clip_5.3gp");
player=Manager.createPlayer(is,"video/3gpp");
player.addPlayerListener(this);
player.realize();
volume = (VolumeControl) player.getControl("VolumeControl");
volume.setLevel(18);
vc = (VideoControl) player.getControl("VideoControl");
if (vc != null) {
vc.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, canvas);
vc.setDisplayLocation(0,0);
vc.setVisible(true);
player.start();
}
}
catch(Exception e)
{
e.printStackTrace();
}
}
protected static String STORAGE_DIRECTORY="file:///c:/";

public void play2() {
try
{
InputConnection file = (FileConnection)Connector.open(STORAGE_DIRECTORY+" clip_5.3gp");
InputStream is = file.openInputStream();
player = Manager.createPlayer(is,"video/3gpp");
player.addPlayerListener(this);
player.realize();
volume = (VolumeControl) player.getControl("VolumeControl");
volume.setLevel(18);
vc = (VideoControl) player.getControl("VideoControl");
if (vc != null) {
vc.initDisplayMode(VideoControl.USE_DIRECT_VIDEO, canvas);
vc.setDisplayLocation(0,0);
vc.setVisible(true);
player.start();
}
}
catch(Exception e)
{
e.printStackTrace();
}

}


public void playerUpdate(Player player,
String event, Object data) {
}



}

import java.io.IOException;
import javax.microedition.lcdui.*;
public class GSMCanvas extends Canvas{

String menus[]={"Video from Resource","Video from File System"};
Image background;
Image header;
Image footer;
Image selected;
Image unselected;
Font menuFont;
Font headerFont;
Font textFont;
int index=0;
int YAXIS=60;
GSMmidlet midlet;
public GSMCanvas()
{

menuFont = Font.getFont(Font.FACE_SYSTEM,Font.STYLE_BOLD,Font .SIZE_MEDIUM);
headerFont = Font.getFont(Font.FACE_SYSTEM,Font.STYLE_BOLD,Font .SIZE_LARGE);
textFont = Font.getFont(Font.FACE_SYSTEM,Font.STYLE_PLAIN,Fon t.SIZE_MEDIUM);
try
{

background=Image.createImage("/BACKGROUND.png");
header=Image.createImage("/header.png");
footer=Image.createImage("/footer.png");
selected=Image.createImage("/selected.png");
unselected=Image.createImage("/unselected.png");

}
catch(IOException e)
{
e.printStackTrace();
}


}
protected void paint(Graphics g) {
g.drawImage(background, 0, 0, 0);
g.drawImage(header, 0, 0, 0);
g.drawImage(footer, 5, getHeight()-30, 0);
g.drawImage(unselected, 0, 80, 0);
g.drawImage(unselected, 0, 130, 0);
g.setColor(255,255,255);
g.drawString(menus[0], 20, 85, 0);
g.drawString(menus[1], 20, 135, 0);
g.drawImage(selected, 0, YAXIS, 0);
g.setFont(menuFont);
g.drawString(menus[index], 20, YAXIS+10, 0);

}

public void keyPressed(int key)
{

System.out.println("Key"+key);
if(key==-2)
{
index++;
YAXIS=60;
System.out.println("index:"+index);
if(index==1)
{
//index=0;
YAXIS=130;
System.out.println("Index in if:"+index);
}
else if(index>1)
{
index=0;
YAXIS=60;
}
}

if(key==-1)
{
index--;
YAXIS=130;
if(index==0)
{
YAXIS=60;
}
else if(index<0)
{
index=1;
YAXIS=130;
}
}

if(key==-5)
{
System.out.println("Index in -5"+index);
midlet.start();
}


repaint();
}
}

thanks in advance
ajj
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