Can someone tell me where my code is going wrong

Question

Hi I am trying to save the information in a jtextfield and then reopen that data at a later date in the same jtextfield. I have put the code in and it runs but when I try to save the jtextfield it does not create a file so when I try to reopen it there is no file to open as none was made, but i can get the save filechooser and open filechooser to open just not do what I want them to.
Thanks the Lord of the realm.
* NewJFrame.java
* Created on 10 November 2007, 20:03
package javaapplication56;
import java.awt.Component;
import java.io.File;
import javax.swing.JFileChooser;
* @author  morgan
public class NewJFrame extends javax.swing.JFrame {
    /** Creates new form NewJFrame */
    public NewJFrame() {
        initComponents();
    //Create a file chooser
final JFileChooser fc = new JFileChooser();
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">                         
    private void initComponents() {
        jTextField1 = new javax.swing.JTextField();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();
        jButton2 = new javax.swing.JButton();
        jButton4 = new javax.swing.JButton();
        jButton1 = new javax.swing.JButton();
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane1.setViewportView(jTextArea1);
        jButton2.setText("calculate");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
        jButton4.setText("OPEN");
        jButton4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton4ActionPerformed(evt);
        jButton1.setText("SAVE");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addGap(80, 80, 80)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 87, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 52, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                        .addComponent(jButton4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(jButton2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                    .addComponent(jButton1))
                .addGap(27, 27, 27))
        layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {jButton1, jButton2, jButton4});
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(30, 30, 30)
                        .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(54, 54, 54)
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(49, 49, 49)
                        .addComponent(jButton2)
                        .addGap(46, 46, 46)
                        .addComponent(jButton4)
                        .addGap(20, 20, 20)
                        .addComponent(jButton1)))
                .addContainerGap(100, Short.MAX_VALUE))
        pack();
    }// </editor-fold>                       
    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                        
JFileChooser jfc = new JFileChooser(new File(jTextField1.getText()));
    if (evt.getSource() == jButton1) {
            int returnVal = jfc.showSaveDialog(this);
            if (returnVal == JFileChooser.APPROVE_OPTION) {
                File file = jfc.getSelectedFile();
    private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {                                        
      if (evt.getSource() == jButton4) {
        int returnVal = fc.showOpenDialog(NewJFrame.this);
        if (returnVal == JFileChooser.APPROVE_OPTION) {
            File file = fc.getSelectedFile();
            //This is where a real application would open the file.
            append("Opening: " + file.getName() + "." + newline);
        } else {
            append("Open command cancelled by user." + newline);
    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                        
float num1, result;
    num1 = Float.parseFloat(jTextField1.getText());
          result = num1;
                 jTextArea1.setText(String.valueOf(result));
    private String newline;
    private Object aComponent;
     * @param args the command line arguments
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new NewJFrame().setVisible(true);
    private void append(String string) {
        throw new UnsupportedOperationException("Not yet implemented");
    // Variables declaration - do not modify                    
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JButton jButton4;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration                  
}Edited by: Reg_Dwight on Dec 19, 2007 5:10 PM

Answer 1

Reg_Dwight wrote:
please can you be more specific I am new at filechoosers and I am unsure of you reply although I am grateful for it though.I can see you are using an IDE. I agree, it looks so easy but the code under an IDE-generated GUI can be so complicated.
I'm no expert, but I can tell you that I started with java.io.File, java.io.PrintWriter, and java.util.Scanner for simple I/O. It's only now that I am hard-coding GUI components even though I use an IDE.
My unsolicited advice is to run through those three classes first, preferably as book topics, so that you can get a feel for file I/O.