Cannot write to file

Question

Hello everyone,
I'm new to java and I need some help for writing to a file, I wrote a programe using the AWT that is suppose to read from a file as soon as the programs comes up, then changes could be made and resubmitted, but I can't seem to capture the new written text, can someone help me please!! here is the code
import java.applet.*;
import java.awt.*;
import java.io.*;
import java.net.URL;
import java.lang.*;
import java.awt.event.*;
public class EditFile2 extends Panel implements ActionListener
   String labelnames [] = {"line1", "line2", "line3", "line4",
                                "line5", "line6", "line7", "line8",
                                 "line9", "line10", "line11", "line12",
                                "line13", "line14", "line15", "line16",
                                "line17", "line18", "line19", "line20"}; 
   String textfieldnames[] = {"line1", "line2", "line3", "line4",
                                "line5", "line6", "line7", "line8",
                                 "line9", "line10", "line11", "line12",
                                "line13", "line14", "line15", "line16",
                                "line17", "line18", "line19", "line20"}; 
    private Panel editPanel = new Panel();
    public EditFile2(){
         String in[] = new String[20];
         try{
            FileInputStream fis = new FileInputStream("C:/Program Files/s1studio_jdk/j2sdk1.4.1_02/javastuff/sampledir/icc.txt");
            BufferedInputStream bis= new BufferedInputStream(fis);
            BufferedReader dis = new BufferedReader(new InputStreamReader(bis));
                for(int i=0; i<20; i++){
                   in= dis.readLine();
System.out.println(in[i]);
this.textfieldnames[i] = in[i];
catch(IOException ioe){
System.out.println("file not found" +ioe);
//g.drawString("file not found" +ioe, 200, 200);
catch(SecurityException e){
System.out.println("file not security");
//g.drawString("e" + e, 1, 1);
editPanel.setLayout(new GridLayout(21, 2));
for(int row=0; row< textfieldnames.length; row++){
editPanel.add(new TextField (textfieldnames[row]));
editPanel.add(new Label(labelnames[row]));
submitButton = new Button("Enter New Scroll Lines");
editPanel.add(submitButton);
submitButton.addActionListener(this);
setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.gridx= 1; c.gridy =1;
c.weightx=1.0;
add(editPanel, c);
public void actionPerformed( ActionEvent event )
try{
FileOutputStream fos = new FileOutputStream("C:/Program Files/s1studio_jdk/j2sdk1.4.1_02/javastuff/sampledir/icc.txt");
DataOutputStream dos = new DataOutputStream(fos);
for(int i=0; i<20; i++){
dos.writeBytes(new String(textfieldnames[i]));
System.out.println("writing to file");
catch(IOException ioe){
System.out.println("file not found" +ioe);
//g.drawString("file not found" +ioe, 200, 200);
private FileInputStream fis;
private BufferedInputStream bis;
private BufferedReader dis;
private Button submitButton;
public static void main(String args[]){
Frame f = new Frame("Edit text form here");
f.add(new EditFile2());
f.pack();
f.setVisible(true);

Answer 1

Hi islandcat,
I don't understand your question.
You've got values that you read from a file. You're talking about values in text boxes. Please try to write a sensible sequence of events that you want to happen and tell me where the behavior you observe goes wrong.
Maybe you're saying this:
1. Read initial values for text boxes from a file on startup.
2. Allow users to modify values in text boxes during operation.
3. Save altered values to file again when shutting down the app.
I didn't study your code carefully enough to really understand what you're doing. I'm not sure that I want to.
I've taken care of your exceptions. Unwanted behavior is really your problem. I'd suggest that you study what you've done more carefully and try to figure it out for yourself. You'll get some satisfaction out of having solved a real problem. You might even learn something about how to go about it. - MOD