Java Swing中带有颜色的菜单[关闭]

Question

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[<9天前关闭。

单击按钮时，我需要在按钮下方显示一个菜单，并且该菜单应包含下图所示的颜色。我尝试了多种方法来实现它，但是我的尝试是徒劳的。您可以为我提供建议或任何类似的解决方案吗？

Answer 1

在此，我尽力为您的问题设计示例设计。它很快，但我希望它能对您有所帮助。主要定义很明显，您可以从https://docs.oracle.com/javase/8/docs/api/index.html?javax/swing/package-summary.html中阅读更多内容

//Here the definition of frame. 
frame = new JFrame();
    frame.setBounds(100, 100, 450, 300);
    frame.getContentPane().setLayout(null);

    //Here the button for display or hide colors menu.
    JButton btnNewButton = new JButton("\uD83D\uDD8A \uD83E\uDC47");
    btnNewButton.setBackground(SystemColor.control);
    btnNewButton.setBounds(326, 13, 70, 32);
    frame.getContentPane().add(btnNewButton);

    //Scrol Pane defined for multiple color buttons.
    JScrollPane scrollPane = new JScrollPane();

    scrollPane.setBounds(188, 45, 208, 140);
    frame.getContentPane().add(scrollPane);
    //Here the panel with Grid Layout defined  for 3 columns.
    JPanel panel = new JPanel();
    panel.setLayout(new GridLayout(3, 3, 5, 5));
    scrollPane.setViewportView(panel);
    //Here the buttons defined with related colors. new Color(R,G,B) >> in RGB format. 
    JButton color1But = new JButton("");
    color1But.setBackground(new Color(255,255,255));
    JButton color2But = new JButton("");
    color2But.setBackground(new Color(122,111,215));
    JButton color3But = new JButton("");
    color3But.setBackground(new Color(1,23,123));
    JButton color4But = new JButton("");
    color4But.setBackground(new Color(5,25,255));
    JButton color5But = new JButton("");
    color5But.setBackground(new Color(55,176,12));
    JButton color6But = new JButton("");
    color6But.setBackground(new Color(5,123,212));
    JButton color7But = new JButton("");
    color7But.setBackground(new Color(61,142,123));
    JButton color8But = new JButton("");
    color8But.setBackground(new Color(221,51,41));
    JButton color9But = new JButton("");
    color9But.setBackground(new Color(2,2,2));
    //Here we add buttons to to our panel
    panel.add(color1But);
    panel.add(color2But);
    panel.add(color3But);
    panel.add(color4But);
    panel.add(color5But);
    panel.add(color6But);
    panel.add(color7But);
    panel.add(color8But);
    panel.add(color9But);
    //And here define the hide and show listener to our button.
    btnNewButton.addMouseListener(new MouseAdapter() {
        @Override
        public void mouseClicked(MouseEvent arg0) {
            //İf its visible set invisible else set invisible.
            if(scrollPane.isVisible()) scrollPane.setVisible(false);
            else scrollPane.setVisible(true);
        }
    });