Make .asm files in a folder as JMenuItems and add them to a JMenu, add ActionListener Events

Question

lets say I have a folder called examples/basics/ In that folder I have a bunch of .asm files. What I would now like to do is to have those files automatically made into JMenuItems, without the .asm extension, placed inside a JMenu and have actionlisteners added to them, that do the following:

User clicks on JMenuItem genetated. A new, lets say a CodeArea object is created and the file examples/basics/what I clikced on is passed in as a new File.

How to achive this with the simplest means?

Answer 1

Simple example for your purposes:

    JFrame frame = new JFrame();
    frame.setSize(400,400);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JMenuBar menu = new JMenuBar();
    frame.setJMenuBar(menu);

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

    File f = new File(PATH_TO_FOLDER);
    if(f.exists()){
        File[] listFiles = f.listFiles();
        for(File file : listFiles){
            if(file.getAbsolutePath().endsWith(EXTENSION)){
                final JMenuItem m = new JMenuItem(file.getName());
                mainMenu.add(m);
                m.addActionListener(new ActionListener() {

                    @Override
                    public void actionPerformed(ActionEvent arg0) {
                        System.out.println(m.toString());
                    }
                });
            }
        }
    }

    frame.setLocationRelativeTo(null);
    frame.setVisible(true);

Here PATH_TO_FOLDER is path to your folder with files

EXTENSION is target extension of file for menus