Here you can find the source of toBinaryString(long val)
public static CharSequence toBinaryString(long val)
//package com.java2s; /**/* ww w . j a v a2 s .co m*/ * File: $HeadURL: https://hdt-java.googlecode.com/svn/trunk/hdt-java/src/org/rdfhdt/hdt/util/io/IOUtil.java $ * Revision: $Rev: 194 $ * Last modified: $Date: 2013-03-04 21:30:01 +0000 (lun, 04 mar 2013) $ * Last modified by: $Author: mario.arias $ * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * * Contacting the authors: * Mario Arias: mario.arias@deri.org * Javier D. Fernandez: jfergar@infor.uva.es * Miguel A. Martinez-Prieto: migumar2@infor.uva.es * Alejandro Andres: fuzzy.alej@gmail.com */ public class Main { public static CharSequence toBinaryString(long val) { StringBuilder str = new StringBuilder(64); int bits = 64; while (bits-- != 0) { str.append(((val >>> bits) & 1) != 0 ? '1' : '0'); } return str; } public static CharSequence toBinaryString(int val) { StringBuilder str = new StringBuilder(32); int bits = 32; while (bits-- != 0) { str.append(((val >>> bits) & 1) != 0 ? '1' : '0'); } return str; } }