CODEWITHSUNDEEP
javafile
JavaKiller
JavaKiller

Reputation: 25

“\n” not adding new line when saving the string to text using BufferWriter to text file

Hi everyone I am trying to add a new line of string into an existing file, however the code i have appends it to the last string instead. I fixed it by adding a new line character to the string appending to the file, is there another way to append a string on a new line at the end of a file without adding the new line character to the beginning of the string? 

String name = "\nbob";
BufferedWriter out = new BufferedWriter(new FileWriter("names.txt",true));
    out.write(name);
    out.close();

current file:

bill
joe
john

after append

bill
joe
john
bob

append without newline

bill
joe
johnbob

Upvotes: 0

Views: 2792

Answers (3)

Farid Ahmed
Farid Ahmed

Reputation: 719

It is use Java 7. BufferedWritter class provide newLine() method for break new line. You can follow this example. example link 

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
public class BufferedWriterDemo {
    //file path
    private static final String FILENAME = "/home/farid/Desktop/bw.txt";
    public static void main(String[] args) {
    //BufferedWriter api        //https://docs.oracle.com/javase/7/docs/api/java/io/BufferedWriter.html
        try(BufferedWriter bw = new BufferedWriter(new FileWriter(FILENAME))) {
            String str = "This is the content to write into file";
            //write method
            bw.write(str);
            //break new line
            bw.newLine();
            String seconStr = "This is the content to write into file.";
            //write method
            bw.write(seconStr);
            //break new line
            bw.newLine();
            //console print message
            System.out.println("Successfully compeleted");
            //BufferedWritter close
            bw.flush();
            bw.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}

Upvotes: 0

Andy Turner
Andy Turner

Reputation: 140299

A \n will be appended to your file here; but clearly you're just viewing it in such a way that you think there's no newline.

If you're working on Windows, \n isn't the correct line separator: use \r\n instead:

String name = "\r\nbob";

Windows uses \r\n as its line separator; and tools like Notepad (still) don't handle non-Windows line endings correctly.

Note that using out.newLine() is not necessarily the correct approach: this means that the current platform's line separator will be used. That might be correct; but if you're running this code on *nix, and the original file was generated on Windows (and has to continue to be readable correctly on Windows), it will not be, because \n will be used. "Write once, run anywhere" doesn't quite work here.

Upvotes: 4

Riaan Nel
Riaan Nel

Reputation: 2535

You can use the newLine() methor prior to writing the new name out to file.

Upvotes: 3

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