Question

I have a String miscFlag which is of size 100. I need to append to this miscFlag starting from index 20 as 0-19 are reserved for some other info. And then append subsequently at certain positions only. Can we do this using StringBuilder/StringBuffer?

This is how i am trying to do it..

    StringBuilder info = new StringBuilder(miscFlag);
    info.append(" ");
    info.append(Misc.toTimestampLiteral(currentDate));//append this from pos 20
    info.append(" ");
    info.append(formattedStartTime);  //append this from pos 40

Here i am not able to specify the position from where to append.

Answer 1

Use the insert method.

info.insert(19, Misc.toTimestampLiteral(currentDate));