Browse button importing values

Question

i have created a browse button. A browser opens up when i click the brose button. i have 3 inputs. on my gui,, i have 3 options in file open. ok cancel and browse with a text box. if i type in the txt file i would like to import and click ok to it it works fine. but when i click browse. the browse screen opens up i select the file click ok but no values appear. any ideas as to why. the browse coding used is.
example. copy this code and save
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.io.*;
import java.util.*;
public class browser extends JFrame implements ActionListener, Serializable
     private JTextField input;
     private JTextField no;
     private JTextField output;
     private JButton browse;
     private JButton file;
     private int inputs, nos, outputs;
     public browser()
          input = new JTextField("");          
          no = new JTextField("");          
          output = new JTextField("");          
          browse = new JButton("Browse");
          browse.addActionListener(this);
          file = new JButton("Read from file");
          file.addActionListener(this);
          /** Add buttons to panel */
          JPanel buttonsPanel = new JPanel(new FlowLayout());
          buttonsPanel.add(browse);
          buttonsPanel.add(file);
          JPanel functionsPanel = new JPanel(new GridLayout(3,2,5,5));
          functionsPanel.add(input);
          functionsPanel.add(no);
          functionsPanel.add(output);
          /** puts on pane */
          Container contentPane = this.getContentPane();
          contentPane.setLayout(new GridLayout(5,3,2,5));
          contentPane.add(buttonsPanel);
          contentPane.add(functionsPanel);
          this.pack();
          this.setVisible(true);     
     public void actionPerformed(ActionEvent evt)
          if(evt.getSource() == browse)
               final JFileChooser browse = new JFileChooser();
               int returnVal = browse.showOpenDialog(browse);
          else if(evt.getSource() == file)
               try
                    String inputValue = JOptionPane.showInputDialog("Please enter file");
                    BufferedReader d = new BufferedReader(new FileReader(inputValue));
                    input.setText(d.readLine());
                    no.setText(d.readLine());
                    output.setText(d.readLine());
                    d.close();
                    inputs = 0;
                    StringTokenizer str = new StringTokenizer(input.getText(), " ");
                    while (str.hasMoreTokens())
                         inputs = Integer.parseInt(str.nextToken()) + inputs;
                    nos = 0;
                    StringTokenizer st = new StringTokenizer(no.getText(), " ");
                    while (st.hasMoreTokens())
                         nos = Integer.parseInt(st.nextToken()) + nos;
                    outputs = 0;
                    StringTokenizer s = new StringTokenizer(output.getText(), " ");
                    while (s.hasMoreTokens())
                         outputs = Integer.parseInt(s.nextToken()) + outputs;
               catch(Exception e){}
     /** Constructs */
     public static void main (String args[])
          /** Instance GUI */
          JFrame frame = new browser();
          frame.show();
and in a txt file enter this
486 464 646 4
49 74 9749 7
48 48 484
/* Line 1 = inputs
* Line 2 = nos
* Line 3 = Outputs */
save this then run java file. can import throug read file but not browsing any ideas and also haveing problems with txt filter. thank you

Answer 1

Take a look at this little example. It shows you how to use JFileChoosers, how to set the text in a JTextArea, how to add accelerators to JMenuItems and how to read a file in and display it in a JTextArea. It also shows the use of a KeyListener and a KeyAdapter. Some of the real fundamentals of what you are trying to do here.
In the future, be sure that you post swing-related questions in the swing forum.
Here you go:
import javax.swing.*;
import java.io.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import static javax.swing.JFileChooser.APPROVE_OPTION;
     public class Browser extends JFrame {
          private JTextArea jta;
          private JScrollPane jsp;
          private JMenuBar jmb;
          private JMenu fileMenu;
          private JMenuItem newItem;
          private JMenuItem openItem;
          private JMenuItem exitItem;
          public Browser() {
               jta = new JTextArea();
               jsp = new JScrollPane(jta);
               jmb = new JMenuBar();
               fileMenu = new JMenu("File");
               newItem = new JMenuItem("New");
               openItem = new JMenuItem("Open");
               openItem.setAccelerator(KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_O, java.awt.Event.CTRL_MASK));
               exitItem = new JMenuItem("Exit");
               fileMenu.add(newItem);
               fileMenu.add(openItem);
               fileMenu.addSeparator();
               fileMenu.add(exitItem);
               jmb.add(fileMenu);
               this.getContentPane().add(jsp);
               this.setJMenuBar(jmb);
               this.pack();
               this.setSize(500, 300);
               this.setLocationRelativeTo(null);
               this.setTitle("FileChooser Demo");
               this.setDefaultCloseOperation(EXIT_ON_CLOSE);
                    newItem.addActionListener(new ActionListener() {
                         public void actionPerformed(ActionEvent evt) {
                              newDocument();
                    openItem.addActionListener(new ActionListener() {
                         public void actionPerformed(ActionEvent evt) {
                              openDocument();
                    exitItem.addActionListener(new ActionListener() {
                         public void actionPerformed(ActionEvent evt) {
                              exitProg();
                    jta.addKeyListener(new java.awt.event.KeyAdapter() {
                         public void keyPressed(java.awt.event.KeyEvent evt) {
                              if (evt.getKeyCode() == java.awt.event.KeyEvent.VK_ESCAPE)
                                   exitProg();
          private void newDocument() { jta.setText(""); }
          private void openDocument() {
               JFileChooser jfc = new JFileChooser();
               jfc.setDialogTitle("Open a File");
               int option = jfc.showOpenDialog(null);
               if (option == APPROVE_OPTION) {
                    try {
                         FileInputStream fis = new FileInputStream(jfc.getSelectedFile());
                         InputStreamReader isr = new InputStreamReader(fis);
                         char[] text = new char[fis.available()]; // not a good idea.
                         isr.read(text, 0, fis.available()); // again, not a good idea.;
                         jta.setText(new String(text));
                    } catch (IOException e) { e.printStackTrace(); }
          private void exitProg() {
               System.exit(0);
          public static void main(String[] argv) { new Browser().setVisible(true); }
     }