Could some guru lend me a hand on this one?

Question

Hi all, this is my first post so I hope I don't miss any bits out here, ok it's like this: I'm trying to write a little Java bulletin where you click a button and it gets the infor from a text file on the web and pastes it into a text area, simple so far. However thats far away at the mo, all I'm trying to master at the moment is getting it to copy a text file in the same directory but I get one flipping error that I cant solve and it looks so simple! Heres the code:
package RobsJava;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
public class xenia extends JFrame implements ActionListener {
public xenia() {
setTitle("Welcome to Xenia");
setBounds(100, 100, 420, 400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Creates: Menu bar, Menu, Menu items
JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);
JMenu menu = new JMenu("Menu");
menuBar.add(menu);
JMenuItem item = new JMenuItem("Item Label");
menu.add(item);
//Creates the Java pane
JPanel pane = new JPanel();
//Adds the label "text field"
JLabel roblab1 = new JLabel("Text Field: ");
pane.add(roblab1);
//Adds text area with scroll bar
JTextArea textA = new JTextArea("Text Area", 4, 25);
JScrollPane scroll = new JScrollPane(
textA,
ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
pane.add(scroll);
//Adds update button & Action listener
JButton update = new JButton("Update");
update.addActionListener(this);
pane.add(update);
setContentPane(pane);
show();
pack();
setVisible(true);
//The main program
public static void main(String[] arguments) {
xenia xx = new xenia();
xx.setVisible(true);
//The action listener
public void actionPerformed(java.awt.event.ActionEvent evt) {
Object src = evt.getSource();
if (src == update)
copy();
//The copy program
private Object copy() {
     File inputFile = new File("C:/JavaFiles/sampledir/RobsJava/xenia.txt");
     File outputFile = new File("C:/JavaFiles/sampledir/RobsJava/xenout.txt");
FileReader in = new FileReader(inputFile);
FileWriter out = new FileWriter(outputFile);
int c;
while ((c = in.read()) != -1)
out.write(c);
in.close();
out.close();
// public Object getValue(String str) {
// public void putValue(String str, Object obj) {
Ok so you're supposed to push the button and it coppies xenia.txt and makes a xenout.txt.
The problem is the if function that should calll the copy object thing. When I compile it it wont recognise the variable update.
Anyone?
Cheers
Rob

Answer 1

That's because you declare update to be a local variable in your constructor, but you're referencing it from a different method.
In other words, it's "out of scope".
IMHO, best solution is to use an anonymous inner class for that listener (the one that currently can't find the update variable). Another option is to make update a field in the object, rather than a local variable.