java - 在摆动问题中编写GUI

我目前正在尝试为自己制作的游戏创建GUI，并且开始遇到麻烦。由于某种原因，我无法将计时器的背景更改为蓝色，而将gameGUI的背景更改为绿色的主板。这是我第一次进行挥杆编程，所以我是新手。

我也想知道是否要正确使用layeredpane。木板必须能够成为分层窗格，以便我可以一直将图像放在上面。计时器将是天空，上面有太阳，在某些时候，云彩也会越过它。

如果您能给我一些提示，并在整个过程中帮助我，那将是很棒的，即使您只是在这里和那里纠正一些小问题。

谢谢。

public class gameGUI extends JPanel{

    private ArrayList<BufferedImage> nativeOne = new ArrayList<BufferedImage>();
    private ArrayList<BufferedImage> nativeTwo = new ArrayList<BufferedImage>();
    private ArrayList<BufferedImage> nativeThree = new ArrayList<BufferedImage>();
    private ArrayList<BufferedImage> exoticOne = new ArrayList<BufferedImage>();
    private ArrayList<BufferedImage> exoticTwo = new ArrayList<BufferedImage>();
    private ArrayList<BufferedImage> exoticThree = new ArrayList<BufferedImage>();

    private static int screenWidth = 680;
    private static int screenHeight = 680;

    private JLayeredPane layeredPane;

    public gameGUI(){
        layeredPane = new JLayeredPane();
        layeredPane.setPreferredSize(new Dimension(680, 680));
        layeredPane.setBackground(Color.GREEN);
        layeredPane.setBorder(BorderFactory.createLineBorder(Color.BLACK,2));
    }

    private static JLayeredPane timer(){
        JLayeredPane timer = new JLayeredPane();
        timer.setPreferredSize(new Dimension(800,120));
        timer.setBorder(BorderFactory.createLineBorder(Color.BLACK, 2));
        timer.setBackground(Color.BLUE);
        return timer;
    }

    private static JPanel sideBar(){
        //Create the side bar and add buttons
        JPanel returnMofo = new JPanel();
        JButton nativeOne = new JButton(native1);
        JButton nativeTwo = new JButton(native2);
        JButton nativeThree = new JButton(native3);
        JButton exoticOne = new JButton(exotic1);
        JButton exoticTwo = new JButton(exotic2);
        JButton exoticThree = new JButton(exotic3);
        returnMofo.setLayout(new GridLayout(6,1));
        returnMofo.setPreferredSize(new Dimension(120, 680));
        returnMofo.setBorder(BorderFactory.createLineBorder (Color.BLACK, 2));
        returnMofo.add(nativeOne);
        returnMofo.add(nativeTwo);
        returnMofo.add(nativeThree);
        returnMofo.add(exoticOne);
        returnMofo.add(exoticTwo);
        returnMofo.add(exoticThree);
        return returnMofo;
    }


    private static void createAndShowGUI(){
        JFrame frame = new JFrame();
        frame.setTitle("Storm Watch");
        frame.setSize(800, 800);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        gameGUI gui = new gameGUI();
        frame.add(timer(), BorderLayout.NORTH);
        frame.add(sideBar(), BorderLayout.WEST);
        frame.add(gui, BorderLayout.EAST);

        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args){
        createAndShowGUI();
    }
}

最佳答案

确保将layeredPane和timer设置为opaque。

例如...

layeredPane.setOpaque(true);

您可能还希望将layeredPane添加到主板上...

public TestGameBoard() {
    layeredPane = new JLayeredPane();
    layeredPane.setPreferredSize(new Dimension(680, 680));
    layeredPane.setBackground(Color.GREEN);
    layeredPane.setBorder(BorderFactory.createLineBorder(Color.BLACK, 2));
    layeredPane.setOpaque(true);

    setLayout(new BorderLayout()); // Easy to use layout manager
    add(layeredPane); // Now I'm visible ;)
}

在引起您注意的同时，您应该始终在事件调度线程的上下文中创建/操作UI。

public static void main(String[] args) {

    EventQueue.invokeLater(new Runnable() {
        @Override
        public void run() {
            createAndShowGUI();
        }
    });

}