Question

I want to know how to add shortcuts similar to Emacs’s in my Java application. For example C-x C-f and C-x b.

Thanks.

Answer 1

Java provides a means to identify Modifier keys.
By Modifier keys I mean

1. Alt — e.isAltDown();
2. Ctrl — e.isControlDown();
3. Shift — e.isShiftDown()

These acan be paired with other normal key press buttons from your keyboard to identify whether a combination has been pressed.

if( (e.isControlDown() && e.getKeyCode() == KeyEvent.VK_X) )
{

}

e.getModifiers() can be used to identify the modifier as well as the mouse button clicked. This returns bit mask.

See here.
http://www.leepoint.net/notes-java/GUI-lowlevel/keyboard/keyboard.html

I would use it something like this for Ctrl. This is overly simplified code, but you will get an idea.

   JTextField sampleTxtFld= new JTextField();

   sampleTxtFld.addKeyListener(new KeyAdapter() {


          public void keyPressed(KeyEvent e) 
         {
              if((e.isControlDown() && e.getKeyCode() == KeyEvent.VK_X)
              {
                    //identifies whether Ctrl + X has been pressed
                    // do some action here
              }
         }

        public void keyReleased(KeyEvent e) 
        {
              //some key released code here
        }
         public void keyTyped(KeyEvent e) {
         }


   });