Here you can find the source of zero(int x)
private static String zero(int x)
//package com.java2s; /**/*from w ww .jav a2 s .co m*/ * Copyright 2011-2012 Adrian Stabiszewski, as@nfctools.org * * 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 { private static String zero(int x) { String s = Integer.toHexString(x & 0xFF); if (s.length() == 1) return "0" + s; else return s; } }