静态播放器，滚动背景

Question

好的，我一直在关注一个教程，我喜欢它带给我的地方。虽然角色是移动的人，背景随之滚动。有没有办法使用下面的代码我可以改变它？

public class Background {

    private int bgX, bgY, speedX;

    public Background(int x, int y) {
        bgX = x;
        bgY = y;
        speedX = 0;
    }

    public void update() {
        bgX += speedX;

        if (bgX <= -2160) {
            bgX += 4320;
        }
    }

    public int getBgX() {
        return bgX;
    }

    public int getBgY() {
        return bgY;
    }

    public int getSpeedX() {
        return speedX;
    }

    public void setBgX(int bgX) {
        this.bgX = bgX;
    }

    public void setBgY(int bgY) {
        this.bgY = bgY;
    }

    public void setSpeedX(int speedX) {
        this.speedX = speedX;
    }

}

这就是角色：

public void update() {
        // Moves Character or Scrolls Background accordingly.

        if (speedX < 0) {
            centerX += speedX;
        }
        if (speedX == 0 || speedX < 0) {
            bg1.setSpeedX(0);
            bg2.setSpeedX(0);

        }
        if (centerX <= 200 && speedX > 0) {
            centerX += speedX;
        }
        if (speedX > 0 && centerX > 200) {
            bg1.setSpeedX(-MOVESPEED / 5);
            bg2.setSpeedX(-MOVESPEED / 5);
        }

        // Updates Y Position
        centerY += speedY;

        // Handles Jumping

            speedY += 1;

        if (speedY > 3){
            jumped = true;
        }

        // Prevents going beyond X coordinate of 0
        if (centerX + speedX <= 60) {
            centerX = 61;
        }

        rect.set(centerX - 34, centerY - 63, centerX + 34, centerY);
        rect2.set(rect.left, rect.top + 63, rect.left+68, rect.top + 128);
        rect3.set(rect.left - 26, rect.top+32, rect.left, rect.top+52);
        rect4.set(rect.left + 68, rect.top+32, rect.left+94, rect.top+52);
        yellowRed.set(centerX - 110, centerY - 110, centerX + 70, centerY + 70);
        footleft.set(centerX - 50, centerY + 20, centerX, centerY + 35);
        footright.set(centerX, centerY + 20, centerX+50, centerY+35);


    }

我对Java非常有信心，但“像这样的东西”对我来说是新的。