Thread: What Wrong With My Code: IOException.

    }	catch (IOException e){
    		System.err.println("File already exist: " + myFile);

Its Still Overwrites The File?

Err what?
Please elaborate.

login = new JButton(" Login ");
add(login);
login.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {

File myFile = new File(username.getText() + ".txt");
try {

FileWriter fw = new FileWriter(myFile);
PrintWriter pw = new PrintWriter(fw);
pw.println("Username: " + username.getText());
pw.println("Password: " + password.getText());

pw.close();

} catch (FileNotFoundException e) {
System.err.println("File not found: " + myFile);
} catch (IOException e){
System.err.println("File already exist: " + myFile);
} catch (Exception e) {
e.printStackTrace();
}



Its a login system, and it keeps overwriting the files that's already there.

Read the API for FileWriter...use the constructor that accepts an append boolean argument
FileWriter (Java Platform SE 6)

I've Read this twice but i dont understand how to add them, im not using filewriter as a class im using it as a try on a login button>?

Originally Posted by Norm

Is this the same problem?
http://www.javaprogrammingforums.com...t-files-d.html

no, i figared that out then i had a differnt problem lol

Originally Posted by Norm

FileWriter fw = new FileWriter(myFile);

From your code.
That looks like you are using the FileWriter class.

What does the following mean:

login = new JButton(" Login ");
add(login);
login.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
 
File myFile = new File(username.getText() + ".txt");
try {
 
FileWriter fw = new FileWriter(myFile);
PrintWriter pw = new PrintWriter(fw);
pw.println("Username: " + username.getText());
pw.println("Password: " + password.getText());
 
pw.close();
 
} catch (FileNotFoundException e) {
System.err.println("File not found: " + myFile);
} catch (IOException e){
System.err.println("File already exist: " + myFile);
} catch (Exception e) {
e.printStackTrace();
}

Originally Posted by Java Programmer

I've Read this twice but i dont understand how to add them, im not using filewriter as a class im using it as a try on a login button>?

FileWriter fw = new FileWriter(myFile);

How is this not using the FileWriter class? When you create a FileWriter, it creates a new file - overwriting any previous file UNLESS you have specified you wish to append, which you have not.

Edit: as explained here. Please keep discussions in their appropriate threads and not duplicate discussions.