Libgdx null pointer 2d jump and run game - nullpointerexception

Question

I want to implement in my 2d jump and run game that my player can shoot but I always get a null pointer exception.
Does anyone know why?
In this class I check for input:
public class InputIngame implements InputProcessor {
Player player;
public void handleInput(){
//control our player using immediate impulses
if (Gdx.input.isKeyJustPressed(Input.Keys.W) && PlayScreen.player.b2body.getLinearVelocity().y == 0)
PlayScreen.player.b2body.applyLinearImpulse(new Vector2(0, 6f), PlayScreen.player.b2body.getWorldCenter(), true);
if (Gdx.input.isKeyPressed(Input.Keys.D) && PlayScreen.player.b2body.getLinearVelocity().x <= 2)
PlayScreen.player.b2body.applyLinearImpulse(new Vector2(0.2f, 0), PlayScreen.player.b2body.getWorldCenter(), true);
if (Gdx.input.isKeyPressed(Input.Keys.A) && PlayScreen.player.b2body.getLinearVelocity().x >= -2)
PlayScreen.player.b2body.applyLinearImpulse(new Vector2(-0.2f, 0), PlayScreen.player.b2body.getWorldCenter(), true);
if (Gdx.input.isKeyPressed(Input.Keys.D) && Gdx.input.isKeyPressed(Input.Keys.SHIFT_LEFT) && PlayScreen.player.b2body.getLinearVelocity().x > 1)
PlayScreen.player.b2body.setLinearVelocity(1, PlayScreen.player.b2body.getLinearVelocity().y);
if (Gdx.input.isKeyPressed(Input.Keys.A) && Gdx.input.isKeyPressed(Input.Keys.SHIFT_LEFT) && PlayScreen.player.b2body.getLinearVelocity().x < -1)
PlayScreen.player.b2body.setLinearVelocity(-1, PlayScreen.player.b2body.getLinearVelocity().y);
if (Gdx.input.isKeyJustPressed(Input.Keys.SPACE))
player = new Player();
player.fire();
}
in my screen class I draw the fireball:
#Override
public void render(float delta) {
//separate our update logic from render
update(delta);
//Clear the game screen with Black
Gdx.gl.glClearColor(0, 0, 0, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
//render our game map
renderer.render();
if (player.isDead == true)
player.die();
player.draw(runner.batch);
//renderer our Box2DDebugLines
b2dr.render(world, gamecam.combined);
runner.batch = new SpriteBatch();
runner.batch.setProjectionMatrix(gamecam.combined);
runner.batch.begin();
player.draw(runner.batch);
runner.batch.end();
if (TimeUtils.timeSinceNanos(startTime) > 1000000000) {
startTime = TimeUtils.nanoTime();
}
Gdx.app.log("FPSLogger", "fps: " + Gdx.graphics.getFramesPerSecond());
}
In my player class I set my variables:
private PlayScreen screen;
private Array<FireBall> fireballs;
And init them:
public Player(PlayScreen screen){
//initialize default values
runner = new HardwareRunner();
this.screen = screen;
fireballs = new Array<FireBall>();
And this method is execudet in the render method:
public void update(float dt){
//update our sprite to correspond with the position of our Box2D body
setPosition(b2body.getPosition().x - getWidth() / 2, b2body.getPosition().y - getHeight() / 2);
//update sprite with the correct frame depending on marios current action
setRegion(getFrame(dt));
for(FireBall ball : fireballs) {
ball.update(dt);
}
}
And there are also these methods:
public void fire(){
fireballs.add(new FireBall(screen, b2body.getPosition().x, b2body.getPosition().y, runningRight ? true : false));
}
public void draw(Batch batch){
super.draw(batch);
for(FireBall ball : fireballs)
ball.draw(batch);
}
And then theres my fireball class:
public class FireBall extends Sprite {
PlayScreen screen;
World world;
Array<TextureRegion> frames;
Animation fireAnimation;
float stateTime;
boolean destroyed;
boolean setToDestroy;
boolean fireRight;
Body b2body;
public FireBall(PlayScreen screen, float x, float y, boolean fireRight){
this.fireRight = fireRight;
this.screen = screen;
this.world = screen.getWorld();
frames = new Array<TextureRegion>();
for(int i = 0; i < 4; i++){
frames.add(new TextureRegion(screen.getAtlas().findRegion("fireball"), i * 8, 0, 8, 8));
}
fireAnimation = new Animation(0.2f, frames);
setRegion(fireAnimation.getKeyFrame(0));
setBounds(x, y, 6 / HardwareRunner.PPM, 6 / HardwareRunner.PPM);
defineFireBall();
}
public void defineFireBall(){
BodyDef bdef = new BodyDef();
bdef.position.set(fireRight ? getX() + 12 /HardwareRunner.PPM : getX() - 12 /HardwareRunner.PPM, getY());
bdef.type = BodyDef.BodyType.DynamicBody;
if(!world.isLocked())
b2body = world.createBody(bdef);
FixtureDef fdef = new FixtureDef();
CircleShape shape = new CircleShape();
shape.setRadius(3 / HardwareRunner.PPM);
fdef.filter.categoryBits = HardwareRunner.PROJECTILE_BIT;
fdef.filter.maskBits = HardwareRunner.GROUND_BIT |
HardwareRunner.BRICK_BIT |
HardwareRunner.OBJECT_BIT;
fdef.shape = shape;
fdef.restitution = 1;
fdef.friction = 0;
b2body.createFixture(fdef).setUserData(this);
b2body.setLinearVelocity(new Vector2(fireRight ? 2 : -2, 2.5f));
}
public void update(float dt){
stateTime += dt;
setRegion(fireAnimation.getKeyFrame(stateTime, true));
setPosition(b2body.getPosition().x - getWidth() / 2, b2body.getPosition().y - getHeight() / 2);
if((stateTime > 3 || setToDestroy) && !destroyed) {
world.destroyBody(b2body);
destroyed = true;
}
if(b2body.getLinearVelocity().y > 2f)
b2body.setLinearVelocity(b2body.getLinearVelocity().x, 2f);
if((fireRight && b2body.getLinearVelocity().x < 0) || (!fireRight && b2body.getLinearVelocity().x > 0))
setToDestroy();
}
public void setToDestroy(){
setToDestroy = true;
}
public boolean isDestroyed(){
return destroyed;
}
}
But if I try to start the game I get this error:
Exception in thread "LWJGL Application" java.lang.NullPointerException
at de.tobls.hardwarerunner.Input.InputIngame.handleInput(InputIngame.java:30)
at de.tobls.hardwarerunner.Screens.PlayScreen.update(PlayScreen.java:109)
at de.tobls.hardwarerunner.Screens.PlayScreen.render(PlayScreen.java:130)
at com.badlogic.gdx.Game.render(Game.java:46)
at de.tobls.hardwarerunner.HardwareRunner.render(HardwareRunner.java:71)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:215)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:120)
line 30 is player.fire();
line 109 is input.handleInput();
line 130 is update(delta);
and line 71 is update(delta); in my main class
I hope anyone can help me!

Answer 1

i think your problem is you forget brakets in "if" condition try this :
if (Gdx.input.isKeyJustPressed(Input.Keys.SPACE)) {
player = new Player();
player.fire();
}
good luck ;
if any trouble leave a comment ;)