The BA wants a window that

• has a close button
• has a maximize button
• has no enabled minimize button

Considering the requirements for window control buttons, it seems there’s no way around JFrame. But how do I disable the minimize button? I will consider going for native methods, if it’s the only way (the apps are installed on Windows PCs)

I can do something like this, but the minimize button stays enabled — just the frame pops back up

import javax.swing.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class NonMinimizableFrameDemo {

    public NonMinimizableFrameDemo() {
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 300);
        frame.setLocationRelativeTo(null);
        frame.addWindowListener(getWindowAdapter());
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(NonMinimizableFrameDemo::new);
    }
    private final JFrame frame = new JFrame();

    private WindowAdapter getWindowAdapter() {
        return new WindowAdapter() {

            @Override
            public void windowIconified(WindowEvent we) {
                frame.setState(JFrame.NORMAL);
                JOptionPane.showMessageDialog(frame, "Cant Minimize");
            }
        };
    }
}