public class Bullet {
    private Rectangle rect;
    private float velocity;

    public Bullet(Rectangle rect, float velocity) {
        this.rect = rect;
        this.velocity = velocity;
    }

    public void updateRight() {
        rect.x += velocity;
    }

    public void updateLeft() {
        rect.x -= velocity;
    }

    public Rectangle getRect() {
        return rect;
    }

    public float getVelocity() {
        return velocity;
    }
}

if (arrayBullet.size != 0) {
    for (num = 0; num < arrayBullet.size; num++) {
    if (isFire) {
        arrayBullet.get(num).updateRight();
    }
    if (!isFire) {
        arrayBullet.get(num).updateLeft();
    }

byte i = 0;
    if(facesRight){
        isFire=true;
    }
    else {
        isFire=false;
    }

    arrayBullet.add(new Bullet(new Rectangle(position.x, position.y + 0.3f, 0.7f, 0.7f), 0.3f));