How to create shortcut to open a Jmenu?

Question

Speak guys, does anyone know how to create a keyboard shortcuts method to open a Jmenu. For example, click F1 or CTRL + "something" and open a screen.

Answer 1

Take this example, I think it will suit you:

JMenu actionMenu = new JMenu("Actions");
actionMenu.setMnemonic(KeyEvent.VK_A);

Where the menu will be accessed with the keys Alt+To

Att.

Answer 2

You can use the class KeyboardFocusManager to capture keyboard events and verify which was the event that triggered it:

KeyboardFocusManager
        .getCurrentKeyboardFocusManager()
        .addKeyEventDispatcher(new KeyEventDispatcher() {
          @Override
          public boolean dispatchKeyEvent(KeyEvent e) {
            System.out.println(e);
            if (e.getID() == e.KEY_RELEASED && e.getKeyCode() == KeyEvent.VK_F1) {
              jMenu1.setPopupMenuVisible(true);
              jMenu1.setArmed(true);
              return true;
            }
            return false;
          }
        });

In the example above the menu jMenu1 by pressing the button F1.

KeyboardFocusManager

The Keyboardfocusmanager is Responsible for Managing the active and focused Windows, and the Current Focus Owner. The Focus Owner is defined as the Component in an application that will typically receive all KeyEvents generated by the user.

In free translation:

Keyboardfocusmanager is responsible for managing the active and focused window, and the focus holder. The focus holder is defined as the component in the application that will typically receive all KeyEvents user-generated.

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KeyEvents

An Event which indicates that a keystroke occurred in a Component.

In free translation:

An event that indicates which key was pressed into a component.

Reference: How to close a Jframe using keyboard events?