i am trying to create random bullets but it is not working for some reason. also how can i make a delay so the bullets come every 30 seconds or 1 minute???? also the onTouch method does not work and it is not taking the bullet away????

shall i put the array in the GameRender class? thanks

public class GameWorld {

public static Ball ball;
private Bullet bullet1;
    private ScrollHandler scroller;
    private Array<Bullet> bullets = new Array<Bullet>();

public GameWorld() {
    ball = new Ball(280, 273, 32, 32);
    bullet = new Bullet(-300, 200);
    scroller = new ScrollHandler(0);
    bullets.add(new Bullet(bullet.getX(), bullet.getY()));

    bullets = new Array<Bullet>();

    Bullet bullet = null;
    float bulletX = 0.0f;
    float bulletY = 0.0f;
    for (int i=0; i < 10; i++) {
       bulletX = MathUtils.random(-10, 10);
       bulletY = MathUtils.random(-10, 10);
       bullet = new Bullet(bulletX, bulletY);

       bullets.add(bullet); 
    }
}

public void update(float delta) {
    ball.update(delta);
    bullet.update(delta);
    scroller.update(delta);
}

public static Ball getBall() {
    return ball;
}

public ScrollHandler getScroller() {
    return scroller;
}

public Bullet getBullet1() { 
    return bullet1;
}
}

i also tried this and it is not working, i used this in the GameRender class

Array<Bullet> enemies=new Array<Bullet>();

//in the constructor of the class
enemies.add(new Bullet(bullet.getX(), bullet.getY()));

 // this throws an exception for some reason??? this is in the render method
for(int i=0; i<bullet.size; i++)
   bullet.get(i).draw(batcher);

//this i am using in any method that will allow me from the constructor to update to render
for(int i=0; i<bullet.size; i++)
bullet.get(i).update(delta);

this is not taking the bullet out

@Override
public boolean touchDown(int screenX, int screenY, int pointer, int button) {
for(int i=0; i<bullet.size; i++)
 if(bullet.get(i).getBounds().contains(screenX,screenY))
     bullet.removeIndex(i--);
return false;
}

thanks for the help anyone.