I am trying to create a jTextField that only accepts 0-9 and one “.” ( that is currency format).

• But processing key event does not display anything on the textbox
• But keycode is printed on console properly.

What am I doing wrong

I am using

• NetBeans 22 on Windows 11
• openjdk version “20” 2023-03-21

here is the code

txtMrp = new javax.swing.JTextField()
{
    @Override
    public void processKeyEvent(KeyEvent ev) {
        int c = ev.getKeyCode();
        System.out.println("Keycode: " + c);
        if (
            (c>=KeyEvent.VK_0 && c<=KeyEvent.VK_9) ||
            (c>=KeyEvent.VK_NUMPAD0 && c<=KeyEvent.VK_NUMPAD9) ||
            c == KeyEvent.VK_BACK_SPACE ||
            c == KeyEvent.VK_DELETE ||
            c == KeyEvent.VK_LEFT ||
            c == KeyEvent.VK_RIGHT ||
            (c==KeyEvent.VK_PERIOD && !this.getText().contains("."))
        ) {
            super.processKeyEvent(ev);
        }
        ev.consume();
        return;
    }
}
;

here is the screenshots