Write a line of text to File

This code writes the string to a file. It is important to close the writer, so this is done in a finally block.

public void writeLineToFile(String str) throws IOException {
  File file = new File("file.txt");
  BufferedWriter bw = null;
  try {
    bw = new BufferedWriter(new FileWriter(file));
    bw.write(str);
  } finally {
    if (bw != null) {
      bw.close();
    }
  }
}

Also note that write(String s) does not place newline character after string has been written. To put it use newLine() method.

Java 7 adds the java.nio.file package, and try-with-resources:

public void writeLineToFile(String str) throws IOException {
    Path path = Paths.get("file.txt");
    try (BufferedWriter bw = Files.newBufferedWriter(path)) {
        bw.write(str);
    }
}

Found a mistake? Have a question or improvement idea? Let me know.

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