What type of console println do competitive programmers use in Java?

Question

Which is the fastest way to write to System.out?
I know 3 ways so far:
1. the classic one:

for (int i = 0; i < 100000; i++) {
    System.out.println( i );
}

2. Using StringBuilder:

StringBuilder sb = new StringBuilder();
for (int i = 0; i < 100000; i++) {
    sb.append(i).append("\n");
}
System.out.print(sb.toString());

3. Wrapping System.out in a Buffer like:

OutputStream out = new BufferedOutputStream(System.out);
for (int i = 0; i < 100000; i++) {
    out.write((i + "\n").getBytes());
}
out.flush();  

Is there any method that is more efficient than all of these?