Java ToolBar Demo

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

    public class ToolBarDemo2 extends JFrame {
     protected JTextArea textArea;
     protected String newline = "\n";
  
         public ToolBarDemo2() {
         //Do frame stuff.
         super("ToolBarDemo2");
             addWindowListener(new WindowAdapter() {
                 public void windowClosing(WindowEvent e) {
                 System.exit(0);
             }
         });
      
         JToolBar toolBar = new JToolBar();
         toolBar.setFloatable(false);
         addButtons(toolBar);
         textArea = new JTextArea(5, 30);
         JScrollPane scrollPane = new JScrollPane(textArea);
      
         //Lay out the content pane.
         JPanel contentPane = new JPanel();
         contentPane.setLayout(new BorderLayout());
         contentPane.setPreferredSize(new Dimension(400, 100));
         contentPane.add(toolBar, BorderLayout.NORTH);
         contentPane.add(scrollPane, BorderLayout.CENTER);
         setContentPane(contentPane);
     }
  
         protected void addButtons(JToolBar toolBar) {
         JButton button = null;
      
         button = new JButton(new ImageIcon("images/left.gif"));
         button.setToolTipText("This is the left button");
             button.addActionListener(new ActionListener() {
                 public void actionPerformed(ActionEvent e) {
                 displayResult("Action for first button");
             }
         });
         toolBar.add(button);
      
         button = new JButton(new ImageIcon("images/middle.gif"));
         button.setToolTipText("This is the middle button");
             button.addActionListener(new ActionListener() {
                 public void actionPerformed(ActionEvent e) {
                 displayResult("Action for second button");
             }
         });
         toolBar.add(button);
      
         button = new JButton(new ImageIcon("images/right.gif"));
         button.setToolTipText("This is the right button");
             button.addActionListener(new ActionListener() {
                 public void actionPerformed(ActionEvent e) {
                 displayResult("Action for third button");
             }
         });
         toolBar.add(button);
      
         toolBar.addSeparator();
      
         button = new JButton("Another button");
             button.addActionListener(new ActionListener() {
                 public void actionPerformed(ActionEvent e) {
                 displayResult("Action for fourth button");
             }
         });
         toolBar.add(button);
      
         JTextField textField = new JTextField("A text field");
         toolBar.add(textField);
     }
  
         protected void displayResult(String actionDescription) {
         textArea.append(actionDescription + newline);
     }
  
         public static void main(String[] args) {
         ToolBarDemo2 frame = new ToolBarDemo2();
         frame.pack();
         frame.setVisible(true);
     }
}