Creating variables in a java swing program useing event

Question

This is my code:
*Old School Calculator
*@Collin Doering
*Version 2.00
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class OSC {
     private static void createAndShowGUI() {
          int first = 0;
          int second = 0;
          int third = 0;
          int fourth = 0;
          int fifth = 0;
          int answer;
          System.out.println ("Calculations");
          System.out.println ("-------------");
          JFrame.setDefaultLookAndFeelDecorated(true);
          JFrame frame = new JFrame("OSC");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton button1 = new JButton("1");
button1.setMnemonic(1);
button1.addActionListener
     new ActionListener() {
          public void actionPerformed (ActionEvent e) {
first = 1;
//This is when the error says "Local variable first is accesed from
with in inner class; needs to be declared final;
               System.out.println ("first = ");
JButton button2 = new JButton("2");
button2.setMnemonic(2);
button2.addActionListener
     new ActionListener() {
          public void actionPerformed (ActionEvent e) {
               System.out.println ("Second = ");
JButton buttonx = new JButton("x");
buttonx.addActionListener
     new ActionListener() {
          public void actionPerformed (ActionEvent e) {
               System.out.println ("answer: ");
JPanel panel = new JPanel(new GridLayout(10,10));
panel.add(button1);
          panel.add(button2);
          panel.add(buttonx);
          frame.getContentPane().add(panel);
panel.setBorder(BorderFactory.createEmptyBorder(
30, //top
30, //left
10, //bottom
30) //right
frame.pack();
frame.setVisible(true);
     public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
I am trying to create variables so i can make a calculator (right now i only have buttons 1, 1 and multiply). //This is when the error says "Local variable first is accesed from
with in inner class; needs to be declared final; then when i declare it final it says <identifier expected>. Could some one please help me. thanx.

Answer 1

Please post code within code tags (press the "code" button).
Why are you using an inner class? Simplify:
public class OSC implements ActionListener {
button1.addActionListener( this );
public void actionPerformed( ActionEvent e ) {
    if ( e.getSource() == button1 ) . . .