Here you can find the source of leftPadInt(int number, int width)
public static String leftPadInt(int number, int width)
//package com.java2s; /* //from w w w.ja v a 2 s . c om * Copyright 2003,2004 Peter Lee, Colin Crist * * Licensed 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 { /** * Left pads number with zero's */ public static String leftPadInt(int number, int width) { return leftPad(Integer.toString(number), width, '0'); } /** * Prepends pad characters until length of text is at least width. Will never * truncate the text */ public static String leftPad(String text, int width, char padChar) { StringBuffer result = new StringBuffer(text); while (result.length() < width) { result.insert(0, padChar); } return result.toString(); } }