Viewing Thread:
"Hugo rune Shanks!"

Your a (quite accomplished, by the looks of it) java programmer, what am I doing wrong here?

public class GameScreen extends GameCanvas implements Runnable, CommandListener {
.
. (yada, yada, yada)
.
private PlayerLifeSprite playerLifeSprite[]; // array of classes
.
.
}

public GameScreen(JavaTron midlet,Settings settings,Score score) throws Exception {
super(true);
this.midlet = midlet;
.
.
.
for (int i = 0 ; i < IMAXNUMPLAYERLIVERS ; i++){
playerLifeSprite[i] = new PlayerLifeSprite( playerLifeImage,
PLAYERLIFEWIDTH,
PLAYERLIFEHEIGHT);
}
.
.
.
}

And I'm getting a java.lang.NullPointerException when I run the emulator. Any suggestions?

Pandaemonium wrote:
> Might be a while yet, and it's specifically for the Motorola V300 /
> V500 / V600 series or phones, still, I'll bung it somewhere ;)

I've been wanting to try developing something for mobiles for a while now... I just never seem to get around it it, I've either still got to finish off Applets, or some idot hires me (either that or I'm just too lazy)

Mind if I pick your brains when I finally do get around to it?

> I need to use sprites for score and lives display now, as its just
> crippled (as I expected) my framerate. Damn.

Are you writing it for commercial release, or just to see if you can?

Hugo Rune-Shanks wrote:
> Any chance of posting a link to the game when your done?

Might be a while yet, and it's specifically for the Motorola V300 / V500 / V600 series or phones, still, I'll bung it somewhere ;)

I need to use sprites for score and lives display now, as its just crippled (as I expected) my framerate. Damn.

Pandaemonium wrote:
> Hugo, don't bother. Sorted.


lol... no worries man ;)

Any chance of posting a link to the game when your done?

Hugo, don't bother. Sorted.

PlayerLifeSprite[] playerLifeSprite = new PlayerLifeSprite[MAXNUMPLAYERLIVES];

for (int i = 0 ; i < MAXNUMPLAYERLIVES ; i++){
playerLifeSprite[i] = new PlayerLifeSprite( playerLifeImage, PLAYERLIFEWIDTH, PLAYERLIFEHEIGHT);
}

I didn't initialise the array (grumble, whine, I much prefer C++)

Simon Says wrote:
> private PlayerLifeSprite playerLifeSprite[IMAXNUMPLAYERLIVERS]; //
> array of classes

No, fist thing I tried. Giving a size to the array returns a "]" expected on compilation.

Private static final PlayerLifeSprite playerLifeSprite[IMAXNUMPLAYERLIVERS]; //

also throws an error. >:(

I'm not a java programmer but java.lang.NullPointerException sounds like an array bounds error type thing to me.

Could it be that your array isn't being initiated with IMAXNUMPLAYERLIVERS elements in it?

Should

private PlayerLifeSprite playerLifeSprite[]; // array of classes

be

private PlayerLifeSprite playerLifeSprite[IMAXNUMPLAYERLIVERS]; // array of classes

Your a (quite accomplished, by the looks of it) java programmer, what am I doing wrong here?

public class GameScreen extends GameCanvas implements Runnable, CommandListener {
.
. (yada, yada, yada)
.
private PlayerLifeSprite playerLifeSprite[]; // array of classes
.
.
}

public GameScreen(JavaTron midlet,Settings settings,Score score) throws Exception {
super(true);
this.midlet = midlet;
.
.
.
for (int i = 0 ; i < IMAXNUMPLAYERLIVERS ; i++){
playerLifeSprite[i] = new PlayerLifeSprite( playerLifeImage,
PLAYERLIFEWIDTH,
PLAYERLIFEHEIGHT);
}
.
.
.
}

And I'm getting a java.lang.NullPointerException when I run the emulator. Any suggestions?