Java tutorial
/** * Convert longs (time_t in UNIX terminology) to seconds. */ public class LongToMSec { public static void main(String[] args) { System.out.println(msToSecs(1000)); System.out.println(msToSecs(1100)); System.out.println(msToSecs(1024)); } /** Convert a long ("time_t") to seconds and milliseconds */ public static String msToSecs(long t) { // The first attempt fails for the case "1024" //return t/1000 + "." + t%1000; return Double.toString(t / 1000D); } }