Here you can find the source of toBase2(int b)
public static String toBase2(int b)
//package com.java2s; /*//from w w w.j a v a 2 s. c o m Copyright 2008-2013 Andrew Rapp, http://code.google.com/p/xbee-api/ Copyright 2008-2013 ITACA-TSB, http://www.tsb.upv.es/ Instituto Tecnologico de Aplicaciones de Comunicacion Avanzadas - Grupo Tecnologias para la Salud y el Bienestar (TSB) See the NOTICE file distributed with this work for additional information regarding copyright ownership 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 { public static String toBase2(int b) { if (b > 0xff) { throw new IllegalArgumentException("input value is larger than a byte"); } return padBase2(Integer.toBinaryString(b)); } private static String padBase2(String s) { for (int i = s.length(); i < 8; i++) { s = "0" + s; } return s; } }