Need JMenu help

[robertbob]

Hi, I wonder if anyone can help me with my error?

here is my code:

import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
public class menuTutorial extends JFrame {
    JMenuBar menuBar = new JMenuBar();
 
    public menuTutorial() {
        setLayout(new FlowLayout());

        JMenu file = new JMenu("File");
        menuBar.add(file);

        JMenuItem exit = new JMenuItem("Exit");
        file.add(exit);

        JMenu edit = new JMenu("Edit");
        menuBar.add(edit);
        
        JMenuItem undo = new JMenuItem("Undo");
        undo.add(undo);

        event e = new event();
        exit.addActionListener(e);
    }

    public class event implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            System.exit(0);
        }
    }
    
    public static void main (String args[]) {
        menuTutorial gui = new menuTutorial();
        gui.setJMenuBar(menuBar);
        gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        gui.setSize(400,400);
        gui.setVisible(true);
    }
}

this bit gives me an error: gui.setJMenuBar(menuBar);

it says: non-static variable menuBar cannot be referenced from a static context.

[Fubarable]

The menuBar variable is an instance variable and if you desire to access it in a static method, it must be associated with a menuTutorial object. But easier still is to just add the menuBar to the JFrame (the menuTutorial object or this) in the class's constructor:

    public menuTutorial() {
        setLayout(new FlowLayout());

        JMenu file = new JMenu("File");
        menuBar.add(file);

        JMenuItem exit = new JMenuItem("Exit");
        file.add(exit);

        JMenu edit = new JMenu("Edit");
        menuBar.add(edit);
        
        JMenuItem undo = new JMenuItem("Undo");
        undo.add(undo);

        event e = new event();
        exit.addActionListener(e);

        setJMenuBar(menuBar);
    }

This way you don't need to access it from the main method.

[robertbob]

Thanks a bunch :)

[Fubarable]

You're quite welcome.