SimpleMenu.java

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import javax.swing.*;
import java.awt.event.*;
 
public class SimpleMenu implements ActionListener {
    JTextArea text;
 
    public static void main(String[] args) {
        SimpleMenu simpleMenu = new SimpleMenu();
        simpleMenu.go();
    }
 
    public void go() {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        JMenuBar menuBar = new JMenuBar();
        JMenu menu = new JMenu("Menu A");
 
        JMenuItem menuItem = new JMenuItem("Item");
        menuItem.addActionListener(this);
        menu.add(menuItem);
        menuBar.add(menu);
        frame.setJMenuBar(menuBar);
 
        text = new JTextArea();
        text.setLineWrap(true);
 
        JScrollPane scroller = new JScrollPane(text);
        scroller.setVerticalScrollBarPolicy(
                ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
        scroller.setHorizontalScrollBarPolicy(
                ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        frame.add(scroller);
 
        frame.setSize(350, 300);
        frame.setVisible(true);
    }
 
    public void actionPerformed(ActionEvent event) {
        text.append("Menu item selected\n");
    }
}