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

Benchmarks for most answers here + improved implementation: https://www.genuitec.com/dump-a-stringbuilder-to-file/

The final implementation is along the lines of

try {
    BufferedWriter bw = new BufferedWriter(
            new OutputStreamWriter(
                    new FileOutputStream(file, append), charset), BUFFER_SIZE);
    try {
        final int length = sb.length();
        final char[] chars = new char[BUFFER_SIZE];
        int idxEnd;
        for ( int idxStart=0; idxStart