JAVA - JMenu built from file

Question

I would like to build a JMenu using the content of a text file with this layout / appearance (# for separator ; JMenu X and JMenuItem X will be replaced by String sequences) :

JMenu 1 # JMenuItem 1
JMenu 1 # JMenuItem 2
JMenu 1 # JMenuItem 3
JMenu 2 # JMenuItem 1
JMenu 2 # JMenuItem 2
JMenu 3 # JMenuItem 1
JMenu 3 # JMenuItem 2
JMenu 3 # JMenuItem 3
JMenu 3 # JMenuItem 4

How can i write a loop that will print the content of the file into the each of the appropriate menu items?

Thanks for your support.

I'm just on sheet of paper before coding because I have no idea for this loop. I thought use FileInputStream and BufferedInputStream to read the file and use HashMap to put strings with JMenu as keys and JMenuItem as values. Then, read my HashMap to build the menu. — Fred, Aug 22 '16 at 20:34
You can improve your question. Please read [How to Ask](http://stackoverflow.com/help/how-to-ask) including the link "How to ask questions the smart way." — zhon, Aug 23 '16 at 01:42

Fred · Answer 1 · 2016-08-22T22:27:04.907

Here is the loop that works :

      FileReader monFichier = null;
      BufferedReader tampon = null;
      ArrayList<JMenu> tJMenu = new ArrayList<JMenu>();

      try {
        monFichier = new FileReader("param/tableMenu.bat");
        // Connecte les flux :
        tampon = new BufferedReader(monFichier);
        while (true) {
          // Lit une ligne du fichier :
          String ligne = tampon.readLine();
          // Vérifie la fin de fichier
          if (ligne == null)
            break;
          //On récupère la position du "#" :
          int pos = ligne.indexOf("#");
          //On renseigne nos tableaux :
          boolean existant = false;
          for (JMenu m : tJMenu)
          {
              if (m.getText().equals(ligne.substring(0, pos-1)))
              {
                  m.add(new JMenuItem(ligne.substring(pos+2, ligne.length())));
                  existant = true;
              }
          }
          if (!existant)
          {
            tJMenu.add(new JMenu(ligne.substring(0, pos-1)));
            for (JMenu m : tJMenu)
          {
              if (m.getText().equals(ligne.substring(0, pos-1)))
              {
                  m.add(new JMenuItem(ligne.substring(pos+2, ligne.length())));
              }
          }
          }
        } // Fin du while

        JMenuBar menu = new JMenuBar();
        JFrame f = new JFrame();
        JPanel p = new JPanel();
        f.setContentPane(p);
        f.setJMenuBar(menu);
        f.setSize(600, 800);
        f.setVisible(true);

        for (JMenu m : tJMenu)
          {
              menu.add(m);
          }

      } catch (IOException exception) { 
        exception.printStackTrace();
      } finally {  
        try {
            tampon.close();
            monFichier.close();
        } catch(IOException exception1) {
          exception1.printStackTrace();
        }   
      }

And here is the text file :

JMenu 1 # JMenuItem 1.1
JMenu 1 # JMenuItem 2.1
JMenu 1 # JMenuItem 3.1
JMenu 2 # JMenuItem 1.2
JMenu 2 # JMenuItem 2.2
JMenu 3 # JMenuItem 1.3
JMenu 3 # JMenuItem 2.3
JMenu 3 # JMenuItem 3.3
JMenu 3 # JMenuItem 4.3

JAVA - JMenu built from file

1 Answers1