Network Interface Finder - Java Code Bank

                import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.net.*;
import java.util.*;
import java.io.*;
import java.nio.*;

public class GuiIPAddress extends JFrame implements ActionListener
{
	JButton btnDisplay;
	JTextArea textResult;
		
	public static void main(String args[])
	{
		JFrame f = new GuiIPAddress();
		f.setTitle("Network Interface Viewer");
		f.setSize(400, 550);
		f.setVisible(true);
		f.setResizable(false);
	}
	
	GuiIPAddress()
	{
		Container contentPane;
		contentPane = getContentPane();
		contentPane.setLayout(new FlowLayout());

		textResult = new JTextArea();
		textResult.setColumns(30);
		textResult.setRows(30);
		textResult.setEditable(false);
		JScrollPane scrollText = new JScrollPane(textResult);
		scrollText.setSize(200, 135);
		scrollText.setBorder(BorderFactory.createLineBorder(Color.black));
		contentPane.add(scrollText);
		
		btnDisplay = new JButton("List all Network Interfaces");
		contentPane.add(btnDisplay);
		btnDisplay.addActionListener(this);
		
		setDefaultCloseOperation(EXIT_ON_CLOSE);
	}
	
	public void actionPerformed(ActionEvent event)
	{
		 try {
         Enumeration en = NetworkInterface.getNetworkInterfaces();

         while(en.hasMoreElements()) {
            NetworkInterface ni = (NetworkInterface) en.nextElement();
            textResult.append("\nNet interface:\n "+ni.getName());

            Enumeration en2 = ni.getInetAddresses();

            while (en2.hasMoreElements()){
               InetAddress ip = (InetAddress) en2.nextElement();
               textResult.append("\nIP address:\n "+ ip.toString());
            }
         }
      }
      catch (Exception e) {
         e.printStackTrace();
      }
	}
}