JLabel没有出现在Applet中的JPanel上

Question

我要做的是将JLabel添加到applet中的JPanel。但是，我似乎无法让JLabel出现。我认为我的问题是我添加Jlabels的地方，我不是“刷新屏幕”而且它们不可见。

编辑我看到的图片：Picture of the panels

以下是代码： Main.java

public class Main extends JApplet{
    /**
     * 
     */
    private static final long serialVersionUID = -6568278275823927953L;

    public void init() {
        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                public void run() {
                    createGUI();
                }
            });
        } catch(Exception e) {
            System.err.println("createGUI did not complete!");
        }
    }

    private void createGUI() {
        this.setLayout(new GridLayout(2,1));
        Quiz myQuiz = new Quiz();
        Options myOption = new Options();

        JLabel[] answers = new JLabel[16];
        for(int i = 0; i < 16; i++)
        {
            answers[i] = new JLabel();
            answers[i].setText("HI!");
            answers[i].setOpaque(true);
            myOption.add(answers[i]);
        }
        myQuiz.setOpaque(true);
        myOption.setOpaque(true);
        this.add(myQuiz);
        this.add(myOption);
    }
}

Options.java

public class Options extends JPanel
         implements MouseListener {

/**
 * 
 */
private static final long serialVersionUID = 3701573579935678995L;

Font myFont = new Font("Serif", Font.BOLD | Font.ITALIC, 20);
GridLayout myLayout = new GridLayout(4,4);
int HALF_WIDTH = getWidth() / 2;
int HALF_HEIGHT = getHeight() / 2;

public void init() {
    addMouseListener(this);
    this.setLayout(myLayout);
}