How do I add more buttons in a menu of this type (there's a pic showing the type of menu)?

Question

I don't know the name of this type of menu, but I want to add an item to this kind of menu.

Follow the link for an example of the menu: Link: http://postimg.org/image/7izr3zapl/full/

Answer 1

IntelliJ IDEA has implemented this for Windows and OS X, so you could use it as an example.

Focusing on Windows here, you can take a look at the RecentTasks class for the implementation. To add the recent tasks, the addTasksNativeForCategory native method gets called. This C++ method is implemented in the following file: jumplistbridge.cpp.

Answer 2

Those are menu items with icons. They are not buttons!

import java.awt.*;
import java.awt.image.BufferedImage;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
import java.net.URL;
import javax.imageio.ImageIO;

public class MenuWithIcon {

    private JComponent ui = null;
    String[] urlStrings = {
        "https://i.stack.imgur.com/gJmeJ.png",
        "https://i.stack.imgur.com/gYxHm.png",
        "https://i.stack.imgur.com/F0JHK.png"
    };
    String[] menuNames = {
        "Blue Circle", "Green Triangle", "Red Square"
    };

    MenuWithIcon() {
        initUI();
    }

    public void initUI() {
        if (ui != null) {
            return;
        }

        ui = new JPanel(new BorderLayout(4, 4));
        ui.setBorder(new EmptyBorder(4, 4, 4, 4));

        Image img = new BufferedImage(300, 150, BufferedImage.TYPE_INT_ARGB);
        ui.add(new JLabel(new ImageIcon(img)));
    }

    public JMenuBar getMenuBar() throws Exception {
        JMenuBar mb = new JMenuBar();

        JMenu menu = new JMenu("Menu");
        mb.add(menu);

        for (int i=0; i<urlStrings.length; i++) {
            URL url = new URL(urlStrings[i]);
            Image img = ImageIO.read(url);
            JMenuItem mi = new JMenuItem(menuNames[i], new ImageIcon(img));
            menu.add(mi);
        }

        return mb;
    }

    public JComponent getUI() {
        return ui;
    }

    public static void main(String[] args) {
        Runnable r = new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (Exception useDefault) {
                }
                MenuWithIcon o = new MenuWithIcon();

                JFrame f = new JFrame(o.getClass().getSimpleName());
                f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                f.setLocationByPlatform(true);

                f.setContentPane(o.getUI());
                f.pack();
                f.setMinimumSize(f.getSize());

                try {
                    f.setJMenuBar(o.getMenuBar());
                } catch (Exception ex) {
                    ex.printStackTrace();
                }

                f.setVisible(true);
            }
        };
        SwingUtilities.invokeLater(r);
    }
}