Writing a particular line into a file

Question

I am taking a number of inputs from the user like Name,age,e-mail etc.. , and I concatenated all these fields with a ":" delimiter

`String line = Anjan+":"+21+":"+abc@abcd.com;`

My question is: How do I write the String line into a file? I repeat the process of taking inputs from users. Can somebody explain me, how can I write the line to a file each time, after I am done with reading and concatenating the inputs?

what did you try? edit: http://stackoverflow.com/questions/2885173/java-how-to-create-and-write-to-a-file — Theolodis, Sep 11 '13 at 08:35
Potentially see http://stackoverflow.com/questions/4614227/how-to-add-a-new-line-of-text-to-an-existing-file-in-java — Alexander, Sep 11 '13 at 08:36

score 1 · Answer 1 · answered Sep 11 '13 at 09:05

If you are using java 7 it will be quite easy,

    public void writerToPath(String content, Path path) throws IOException {
        try(BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(Files.newOutputStream(path,StandardOpenOption.CREATE, StandardOpenOption.APPEND)))){
            writer.newLine();
            writer.write(content);
    }
}

Since Writer implements the AutoClosable interface will the writer and underlying streams be closed when finished or if an exception occur.

score 0 · Answer 2 · answered Sep 11 '13 at 08:38

0

public static void write(final String content, final String path)
    throws IOException {
    final FileOutputStream fos = new FileOutputStream(path);
    fos.write(content.getBytes());
    fos.close();
}

answered Sep 11 '13 at 08:38

Luca Mastrostefano

3,201
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score 0 · Answer 3 · answered Sep 11 '13 at 08:41

Try the following code. You can create method and pass values as parameter. It'll append the new line every time. It won't remove existing lines(data)

File logFile = new File( System.getProperty("user.home") + File.separator + "test.txt");
String data = "value";
if(!logFile.exists()){
    logFile.createNewFile();
}
FileWriter fstream = new FileWriter(logFile.getAbsolutePath(),true);
BufferedWriter fbw = new BufferedWriter(fstream);
fbw.write(data);
fbw.newLine();
fbw.close();

Writing a particular line into a file

3 Answers3