为什么我的文字最终落后于我的形象？

Question

public void paint(Graphics g) {

    g.drawImage(backGround, 0, 0, getWidth(), getHeight(), this);
    //Draw the duck, Starting coordinates are 15,15.  DuckHeight/Width =60 (Defined Above)
    g.drawImage(duck1, 15, 15, DuckHeight, DuckWidth, this);
    //Draw the images to the screen in the order from background to foreground
    bufferGraphics.drawImage(duck1, xduck, yduck, this);

    g.setColor(Color.black);
    g.setFont(new Font("Arial", Font.BOLD, 18));
    g.drawString("Score: " + ScoreCounter, 100, 100);

}

我注释掉了将绘制图像的代码行，并且字符串成功出现。为什么我的字符串被绘制在我的图像后面？