have a running Exception

[yy]

when   it   run,it  say   Exception    following:
    java.lang.NullPointerException

at javax.microedition.lcdui.game.Sprite.<init>(+17)
at myprojectb.MyGameWithSpriteCanvas1.createCharacter(+37)

     at myprojectb.MyGameWithSpriteCanvas1.<init>(+48)

     at myprojectb.MyGame.startApp(+15)

     at javax.microedition.midlet.MIDletProxy.startApp(+7)

     at com.sun.midp.midlet.Scheduler.schedule(+270)

     at com.sun.midp.main.Main.runLocalClass(+28)

     at com.sun.midp.main.Main.main(+116)


why?

[shmoove]

Why? Because you have some null object when you call the Sprite constructor. Looking at the Sprite documentation, a NullPointerException is thrown from the constructor because either the image for the sprite is null, or in the case of the copy constructor the other sprite is null.

shmoove

[wooD]

Strart by puting a bunch of System.out.printlns in your

myprojectb.MyGameWithSpriteCanvas1.createCharacter(+37)

method.  This is one of the only ways I find null variables and exceptions. I've found debuggers to be less than adequate, but it's been a while since I used one with J2ME, maybe they've improved?

Wood