Write code to format Zero Leading Long
//package com.book2s; public class Main { public static void main(String[] argv) { long n = 42; int digits = 42; System.out.println(formatZeroLeadingLong(n, digits)); }/*from w w w . j a va2 s. c o m*/ public static String formatZeroLeadingLong(long n, int digits) { /* * we create a format : %% : % the first % is to escape the second % 0 : * 0 zero character %d : how many '0' we want (specified by digits) d : * d the number to format */ String format = String.format("%%0%dd", digits); return String.format(format, n); } }