Java - String won't write to file

Question

I'm trying to simple write a quick string to a text file using Java. However when doing so my code for some reason doesn't throw any errors or exceptions but the text file is empty after clicking the button. Here is my code

btnOk.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            String text = textEntered.getText();
            try{
                PrintWriter out = new PrintWriter("~\\Users\\username\\Desktop\\File1.rft");
                out.println(text);
                out.close();
            }catch(FileNotFoundException io){
                System.out.println(io.getLocalizedMessage());
            }
        }
    });

Some extra info, the username in my file path is my username I just swapped it out for this post.

Any help would be amazing, thanks a lot in advance.

Try to use an absolute path like C:\\Users\\username\\Desktop\\File1.rft — Naruto Biju Mode
– Naruto Biju Mode, Commented Mar 23, 2017 at 23:40
Just add some debug logging to make sure there is actually something in text. — pvg
– pvg, Commented Mar 23, 2017 at 23:41
A tilde for the home directory doesn't work like that on Windows, does it?? — David Conrad
– David Conrad, Commented Mar 23, 2017 at 23:52

jorge · Accepted Answer · 2017-03-24 00:01:18Z

1

Your code works fine with some small testing alterations and if you supply the full file path:

public static void main(String[] args){
        Scanner in = new Scanner(System.in);

        String text = in.nextLine();
        try{
            PrintWriter out = new PrintWriter("/Users/user/NetBeansProjects/TestForSO/src/testforso/file.txt");
            out.println(text);
            out.close();
        }catch(FileNotFoundException io){
            System.out.println(io.getLocalizedMessage());
        }
}

answered Mar 24, 2017 at 0:01

jorge

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Comments

user207421 · Accepted Answer · 2017-03-24 00:27:11Z

1

Only the shell understands ~. Java doesn't, the kernel doesn't. Use the result of System.getProperty("user.home").

As a matter of fact your path doesn't make any sense at all. It should be something like System.getProperty("user.home")+"/Desktop/File1.rft".

Note that you don't need to use backslashes in Java filenames.

edited Mar 24, 2017 at 0:27

answered Mar 24, 2017 at 0:03

user207421

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