java - NullPointerException on Render -

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when try debug this, got nullpointerexception. don't it, must not been initialized correctly can't see what... thanks!

@override public void create() {            texture.setenforcepotimages(false);     camera = new orthographiccamera(virtual_width, virtual_height);     camera.settoortho(true,virtual_width,virtual_height);     batch = new spritebatch();      labyrinthe = new labyrinthe(2, virtual_width);     labyrinthe.generer();     joueur = labyrinthe.getjoueur(); }  @override public void dispose() {     batch.dispose(); }  @override public void render() {                    camera.position.set(joueur.getx(), joueur.gety(), 0);     camera.update();     camera.apply(gdx.gl10);      gdx.gl.glviewport((int) viewport.x, (int) viewport.y, (int) viewport.width, (int) viewport.height);     gdx.gl.glclearcolor(1, 1, 1, 1);     gdx.gl.glclear(gl10.gl_color_buffer_bit);      batch.setprojectionmatrix(camera.combined);     batch.begin();     dessinerlabyrinthe();     dessinerjoueur();     batch.end(); // exception on line }

edit : here exception : 

08-24 09:22:02.413: w/dalvikvm(224): threadid=21: thread exiting uncaught exception (group=0x4001b188) 08-24 09:22:02.413: e/androidruntime(224): uncaught handler: thread glthread exiting due uncaught exception 08-24 09:22:02.480: e/androidruntime(224): java.lang.nullpointerexception 08-24 09:22:02.480: e/androidruntime(224):  @ com.badlogic.gdx.graphics.g2d.spritebatch.rendermesh(spritebatch.java:1042) 08-24 09:22:02.480: e/androidruntime(224):  @ com.badlogic.gdx.graphics.g2d.spritebatch.end(spritebatch.java:269) 08-24 09:22:02.480: e/androidruntime(224):  @ com.me.crazymazes.crazymazes.render(crazymazes.java:60) 08-24 09:22:02.480: e/androidruntime(224):  @ com.badlogic.gdx.backends.android.androidgraphics.ondrawframe(androidgraphics.java:452) 08-24 09:22:02.480: e/androidruntime(224):  @ com.badlogic.gdx.backends.android.surfaceview.glsurfaceviewcupcake$glthread.guardedrun(glsurfaceviewcupcake.java:713) 08-24 09:22:02.480: e/androidruntime(224):  @ com.badlogic.gdx.backends.android.surfaceview.glsurfaceviewcupcake$glthread.run(glsurfaceviewcupcake.java:646)

edit2: never mind forgot call function generates textures.... anyway

in public void create() add this,

renderer.render();

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