Fastest way to write to file?

Question

I made a method that takes a File and a String. It replaces the file with a new file with that string as its contents.

This is what I made

Answer 1

A simple test for you

char[] chars = new char[100*1024*1024];
Arrays.fill(chars, 'A');
String text = new String(chars);
long start = System.nanoTime();
BufferedWriter bw = new BufferedWriter(new FileWriter("/tmp/a.txt"));
bw.write(text);
bw.close();
long time = System.nanoTime() - start;
System.out.println("Wrote " + chars.length*1000L/time+" MB/s.");

Prints

Wrote 135 MB/s.