java Show JOptionPane（带下拉菜单）位于其他窗口顶部

Question

我正在编写一个程序，它在启动时显示以下menu（menu_image）。我有一个小问题：我想在其他窗口的顶部显示它，但我无法实现这一点

class Menu {
    public String showMenu(){
        Object[] options = {"option1", "option2", "option3"};
        Object selectionObject = JOptionPane.showInputDialog(null, "Choose", "Menu", JOptionPane.PLAIN_MESSAGE, null, options, options[0]);
        String selectionString = selectionObject.toString();
        return selectionString;
    }
}

谁能帮帮我吗？提前谢谢

Answer 1

根据伯杰的建议，我用以下方法解决了我的问题

class Menu {
    public String showMenu(){
        //i solved my problem adding the following 2 lines of code...
        JFrame frame = new JFrame();
        frame.setAlwaysOnTop(true);

        Object[] options = {"option1", "option2", "option3"};
        //...and passing `frame` instead of `null` as first parameter
        Object selectionObject = JOptionPane.showInputDialog(frame, "Choose", "Menu", JOptionPane.PLAIN_MESSAGE, null, options, options[0]);
        String selectionString = selectionObject.toString();
        return selectionString;
    }
}