Dumping a Java StringBuilder to File

Question

What is the most efficient/elegant way to dump a StringBuilder to a text file?

You can do:

outputStream.write(stringBuilder.toString().getBytes());
         


        

Answer 1

If the string itself is long, you definitely should avoid toString(), which makes another copy of the string. The most efficient way to write to stream should be something like this,

OutputStreamWriter writer = new OutputStreamWriter(
        new BufferedOutputStream(outputStream), "utf-8");

for (int i = 0; i < sb.length(); i++) {
    writer.write(sb.charAt(i));
}