import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
public class SwingMenu implements ActionListener{
 
  public static void main(String[] args) {
 
SwingMenu s = new SwingMenu();
 
 
 
}
 
public SwingMenu(){
Toolkit toolkit = Toolkit.getDefaultToolkit();
 
    // Get size
    Dimension dimension = toolkit.getScreenSize();
    JFrame frame = new JFrame(" ");
    JPanel panel = new JPanel();
 
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JMenuBar menubar = new JMenuBar();
    JMenu filemenu = new JMenu("File");
    JMenuItem fileItem1 = new JMenuItem("Exit");
    filemenu.add(fileItem1);
    fileItem1.addActionListener(this);
    menubar.add(filemenu);
    frame.setJMenuBar(menubar);
    JTextArea textArea = new JTextArea(27,27);
    JScrollPane scrollPane = new JScrollPane(textArea);
    panel.add(scrollPane);
     JTextArea textArea2 = new JTextArea(3,3);
    JScrollPane scrollPane2 = new JScrollPane(textArea2);
    panel.add(scrollPane2);
frame.add(panel);
int height = dimension.height-30;
    frame.setSize(dimension.width,height);
    frame.setVisible(true);
}
 
 
public void actionPerformed(ActionEvent ev) {
 
  // this is where I want to handle the events
}
}

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
public class SwingMenu implements ActionListener{
   JMenuBar menuBar;
   JMenu filemenu;
   // etc
   public static void main(String[] args) {
      SwingMenu s = new SwingMenu();
   }
 
   public SwingMenu(){
      menuBar = new JMenuBar();
      filemenu = new JMenu("File");
      // etc
   }
}

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
public class SwingMenu {
 
 
// Inner Class Implementation
 
 /* 
 
class actionListener implements ActionListener {
   public void actionPerformed(ActionEvent avt) {
   System.out.println("Triggered");
 }
}   */
 
public static void main(String[] args) {
 
    SwingMenu swingMenu = new SwingMenu();
 
 
    JMenuBar menuBar = new JMenuBar();
    JMenu file = new JMenu("File");
    JMenuItem demo = new JMenuItem("demo");
 
    //demo.addActionListener(swingMenu.new actionListener()); // Using Inner class Implementation 
 
    demo.addActionListener(new actionListener()); // Using a Separate class 
 
 
    file.add(demo);
    menuBar.add(file);
 
    JFrame frame = new JFrame("Frame");
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add(BorderLayout.NORTH,menuBar);
    frame.setSize(300,400);
  } 
}
 
// Event Handling class
 class actionListener implements ActionListener {
   public void actionPerformed(ActionEvent avt) {
   System.out.println("Triggered");
 }
}