Here you can find the source of formatPaddedNumber(long number, int numericPadding)
public static String formatPaddedNumber(long number, int numericPadding)
//package com.java2s; /*/* w ww .j a v a2 s. c om*/ * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ public class Main { public static String formatPaddedNumber(long number, int numericPadding) { StringBuilder outStrBfr = new StringBuilder(Long.toString(number)); while (numericPadding > outStrBfr.length()) { outStrBfr.insert(0, '0'); } return outStrBfr.toString(); } }