Local variable needs to be declared final

Question

This is the error code I am getting:
C:\javacode\Notepad>javac FinalProgram.java
FinalProgram.java:60: local variable textfield1 is accessed from within inner class; needs to be declared final
System.out.println("It is detected " + pressed +
textfield1);
^
1 error
Here is my code:
comments relevant to this topic are //ALL IN CAPS
import java.awt.*; //declare packages needed
import java.awt.event.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import javax.swing.JMenuBar;
public class FinalProgram extends JFrame
    implements ActionListener {
static JFrame frame;
  public void actionPerformed (ActionEvent e) {
      String answer = (e.getActionCommand());
         if (answer == "Get Data") {
          JInternalFrame iFrame = new JInternalFrame("Get Data . ", false, true, false, false);
          iFrame.setLayout(new GridLayout(8,2));
          JLabel label1 = new JLabel("First Name");
          JLabel label2 = new JLabel("Last Name");
          JLabel label3 = new JLabel("Street");
          JLabel label4 = new JLabel("City");
          JLabel label5 = new JLabel("State");
          JLabel label6 = new JLabel("Zip");
          JLabel label7 = new JLabel("Phone");
          JLabel label8 = new JLabel("Click Button to Submit Form -->");
          JTextField textfield1 = new JTextField(10);
          JTextField textfield2 = new JTextField(10);
          JTextField textfield3 = new JTextField(10);
          JTextField textfield4 = new JTextField(10);
          JTextField textfield5 = new JTextField(10);
          JTextField textfield6 = new JTextField(10);
          JTextField textfield7 = new JTextField(10);
          JButton button1 = new JButton("Submit Data");
          //textfield1.addActionListener(this);
          textfield1.addActionListener(this);
          textfield2.addActionListener(this);
          textfield3.addActionListener(this);
          textfield4.addActionListener(this);
          textfield5.addActionListener(this);
          textfield6.addActionListener(this);
          textfield7.addActionListener(this);
          button1.addActionListener(new ActionListener() { //start button1.addActionListener
          public void actionPerformed(ActionEvent a) { //start button1 actionPerformed
                    String pressed = ((JButton) a.getSource()).getText();
                    System.out.println("button press is detected " + pressed + textfield1);  //THIS SYSTEM OUT PRINT IS A TEST, IT WORKS WHEN I DON'T HAVE THE "+ textfield1" PART, IT GIVES ME THE ERROR MESSAGE POSTED ABOVE ABOUT DECLARING IT FINAL.
I'M A BEGINNER, MY GOAL HERE, IN EASY ENGLISH, IS TO GRAB THE DATA FROM EACH TEXTFIELD AND STORE THEM IN VARIABLES, OR MORE IDEALLY IN AN ARRAY SO THAT THE REST OF MY CODE BELOW CAN WRITE THEM TO FILE, I'VE BEEN TRYING THE PAST FEW DAYS ON THIS EXPERIMENTING AND ANY SUGGESTIONS WOULD BE APPRECIATED
          try {
               String directoryName = "c:\\javacode\\Notepad";
               String fileName = "program.txt";
               File output = new File(directoryName,fileName);
               output.createNewFile();
          if (! output.isFile()) {
               System.out.println("File creation of" + output.getPath() + "failed");
        return;
          BufferedWriter out = new BufferedWriter(new FileWriter(output.getPath(), true));
          String[] text = {"This is the text that will be written. \r", //we pass an array, which holds the text to append to the file
                "The text will be written to the file \r",
                "in append mode. If the file does not \r",
                "exist it will be created.\r"};  //WHAT YOU SEE HERE IS JUST A TEST, IN PLACE, I WOULD LIKE TO HAVE THE INFORMATION FOR MY TEXTFIELDS SO THAT I CAN PASS THEM THROUGH A FOR LOOP AS BELOW AND WRITE DATA FOR EACH OF THE TEXTFIELDS TO MY EXTERNAL TEXT FILE
                for(int i = 0; i < text.length; i++) { //using the length of the text message we use out.Write() to write out the data.  Notice that all of the code is placed into a try-catch block so we can check for any IOExceptions that occur
       out.write(text[i] + "\n");
          //Here I create the code to grab the actions(grab the text) from the textFields and store them into variables OR into an array
          //after I have created my container to hold the information for my various textFields, then I want to create a for loop to go through each textField and write that information to a text file, separating each textField on its own line
     out.close();
     catch(IOException d) {
     System.out.println("Error writing to file " + d);
               }  //end button1.addActionListener
          }  //end button1 actionPerformed
          );     //end actionListener statement     
          //textfield1.setSize(10, 10);
          iFrame.add(label1);
          iFrame.add(textfield1);
          iFrame.add(label2);
          iFrame.add(textfield2);
          iFrame.add(label3);
          iFrame.add(textfield3);
          iFrame.add(label4);
          iFrame.add(textfield4);
          iFrame.add(label5);
          iFrame.add(textfield5);
          iFrame.add(label6);
          iFrame.add(textfield6);
          iFrame.add(label7);
          iFrame.add(textfield7);
          iFrame.add(label8);
          iFrame.add(button1);
          iFrame.setSize(200, 500);
          iFrame.setVisible(true);
          add(iFrame);
          if (answer == "Display Data") {
          JInternalFrame iFrame = new JInternalFrame("Display Data . ", false, true, false, false);
          JTextArea text = new JTextArea();
          JScrollPane scroller = new JScrollPane();
          scroller.getViewport().add(text);
          iFrame.getContentPane().add(scroller);
          iFrame.setSize(200, 150);
          iFrame.setVisible(true);
          add(iFrame);
  public FinalProgram() {
    super ("Menu Example");
    JMenuBar jmb = new JMenuBar();
    JMenu file = new JMenu("Functions");
    JMenuItem item;
    file.add(item = new JMenuItem("Get Data"));
    item.addActionListener (this);
    file.add(item = new JMenuItem("Display Data"));
    item.addActionListener (this);
    jmb.add(file);
    addWindowListener(new ExitListener());    
     setJMenuBar (jmb);
    public static void main(String[] args) {
        FinalProgram window = new FinalProgram();
        window.setTitle("Final Program");
        window.setSize(600, 600);
        window.setVisible(true);
}

Answer 1

hi,
Updated Code,
import java.awt.*; //declare packages needed
import java.awt.event.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import javax.swing.JMenuBar;
public class FinalProgram extends JFrame
    implements ActionListener {
static JFrame frame;
          JLabel label1 = new JLabel("First Name");
          JLabel label2 = new JLabel("Last Name");
          JLabel label3 = new JLabel("Street");
          JLabel label4 = new JLabel("City");
          JLabel label5 = new JLabel("State");
          JLabel label6 = new JLabel("Zip");
          JLabel label7 = new JLabel("Phone");
          JLabel label8 = new JLabel("Click Button to Submit Form -->");
          JTextField textfield1 = new JTextField(10);
          JTextField textfield2 = new JTextField(10);
          JTextField textfield3 = new JTextField(10);
          JTextField textfield4 = new JTextField(10);
          JTextField textfield5 = new JTextField(10);
          JTextField textfield6 = new JTextField(10);
          JTextField textfield7 = new JTextField(10);
          JButton button1 = new JButton("Submit Data");
  public void actionPerformed (ActionEvent e) {
      String answer = (e.getActionCommand());
         if (answer == "Get Data") {
          JInternalFrame iFrame = new JInternalFrame("Get Data . ", false, true, false, false);
          iFrame.setLayout(new GridLayout(8,2));
          //textfield1.addActionListener(this);
          textfield1.addActionListener(this);
          textfield2.addActionListener(this);
          textfield3.addActionListener(this);
          textfield4.addActionListener(this);
          textfield5.addActionListener(this);
          textfield6.addActionListener(this);
          textfield7.addActionListener(this);
          button1.addActionListener(new ActionListener() { //start button1.addActionListener
          public void actionPerformed(ActionEvent a) { //start button1 actionPerformed
                    String pressed = ((JButton) a.getSource()).getText();
                    System.out.println("button press is detected " + pressed + textfield1.getText()); 
          try {
               String directoryName = "c:\\javacode\\Notepad";
               String fileName = "program.txt";
               File output = new File(directoryName,fileName);
               output.createNewFile();
          if (! output.isFile()) {
               System.out.println("File creation of" + output.getPath() + "failed");
        return;
          BufferedWriter out = new BufferedWriter(new FileWriter(output.getPath(), true));
          String[] text = {"This is the text that will be written. \r", //we pass an array, which holds the text to append to the file
                "The text will be written to the file \r",
                "in append mode. If the file does not \r",
                "exist it will be created.\r"};  //WHAT YOU SEE HERE IS JUST A TEST, IN PLACE, I WOULD LIKE TO HAVE THE INFORMATION FOR MY TEXTFIELDS SO THAT I CAN PASS THEM THROUGH A FOR LOOP AS BELOW AND WRITE DATA FOR EACH OF THE TEXTFIELDS TO MY EXTERNAL TEXT FILE
                for(int i = 0; i < text.length; i++) { //using the length of the text message we use out.Write() to write out the data.  Notice that all of the code is placed into a try-catch block so we can check for any IOExceptions that occur
       out.write(text[i] + "\n");
          //Here I create the code to grab the actions(grab the text) from the textFields and store them into variables OR into an array
          //after I have created my container to hold the information for my various textFields, then I want to create a for loop to go through each textField and write that information to a text file, separating each textField on its own line
     out.close();
     catch(IOException d) {
     System.out.println("Error writing to file " + d);
               }  //end button1.addActionListener
          }  //end button1 actionPerformed
          );     //end actionListener statement     
          //textfield1.setSize(10, 10);
          iFrame.add(label1);
          iFrame.add(textfield1);
          iFrame.add(label2);
          iFrame.add(textfield2);
          iFrame.add(label3);
          iFrame.add(textfield3);
          iFrame.add(label4);
          iFrame.add(textfield4);
          iFrame.add(label5);
          iFrame.add(textfield5);
          iFrame.add(label6);
          iFrame.add(textfield6);
          iFrame.add(label7);
          iFrame.add(textfield7);
          iFrame.add(label8);
          iFrame.add(button1);
          iFrame.setSize(200, 500);
          iFrame.setVisible(true);
          add(iFrame);
          if (answer == "Display Data") {
          JInternalFrame iFrame = new JInternalFrame("Display Data . ", false, true, false, false);
          JTextArea text = new JTextArea();
          JScrollPane scroller = new JScrollPane();
          scroller.getViewport().add(text);
          iFrame.getContentPane().add(scroller);
          iFrame.setSize(200, 150);
          iFrame.setVisible(true);
          add(iFrame);
  public FinalProgram() {
    super ("Menu Example");
    JMenuBar jmb = new JMenuBar();
    JMenu file = new JMenu("Functions");
    JMenuItem item;
    file.add(item = new JMenuItem("Get Data"));
    item.addActionListener (this);
    file.add(item = new JMenuItem("Display Data"));
    item.addActionListener (this);
    jmb.add(file);
    addWindowListener(new ExitListener());    
     setJMenuBar (jmb);
    public static void main(String[] args) {
        FinalProgram window = new FinalProgram();
        window.setTitle("Final Program");
        window.setSize(600, 600);
        window.setVisible(true);
class ExitListener extends WindowAdapter {
  public void windowClosing(WindowEvent event) {
    System.exit(0);
}