Create A New Line In Java's FileWriter
Answer : If you want to get new line characters used in current OS like \r\n for Windows, you can get them by System.getProperty("line.separator"); since Java7 System.lineSeparator() or as mentioned by Stewart generate them via String.format("%n"); You can also use PrintStream and its println method which will add OS dependent line separator at the end of your string automatically PrintStream fileStream = new PrintStream(new File("file.txt")); fileStream.println("your data"); // ^^^^^^^ will add OS line separator after data (BTW System.out is also instance of PrintStream). Try System.getProperty( "line.separator" ) writer.write(System.getProperty( "line.separator" )); Try wrapping your FileWriter in a BufferedWriter : BufferedWriter bw = new BufferedWriter(writer); bw.newLine(); Javadocs for BufferedWriter here.