Here you can find the source of toBase2(int decimalNumber)
public static String toBase2(int decimalNumber)
//package com.java2s; /*//from w w w. j a v a2 s . co m * **************************************************- * Ingrid Portal Apps * ================================================== * Copyright (C) 2014 - 2015 wemove digital solutions GmbH * ================================================== * Licensed under the EUPL, Version 1.1 or ? as soon they will be * approved by the European Commission - subsequent versions of the * EUPL (the "Licence"); * * You may not use this work except in compliance with the Licence. * You may obtain a copy of the Licence at: * * http://ec.europa.eu/idabc/eupl5 * * Unless required by applicable law or agreed to in writing, software * distributed under the Licence is distributed on an "AS IS" basis, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the Licence for the specific language governing permissions and * limitations under the Licence. * **************************************************# */ public class Main { private static final String baseDigits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; public static String toBase2(int decimalNumber) { return fromDecimalToOtherBase(2, decimalNumber); } private static String fromDecimalToOtherBase(int base, int decimalNumber) { String tempVal = decimalNumber == 0 ? "0" : ""; int mod = 0; while (decimalNumber != 0) { mod = decimalNumber % base; tempVal = baseDigits.substring(mod, mod + 1) + tempVal; decimalNumber = decimalNumber / base; } return tempVal; } }