Here you can find the source of binaryString(byte aByte, boolean prefix)
public static String binaryString(byte aByte, boolean prefix)
//package com.java2s; /*//from ww w . j av a 2s .c o m * BitUtilities.java (Class: com.madphysicist.tools.util.BitUtilities) * * Mad Physicist JTools Project (General Purpose Utilities) * * The MIT License (MIT) * * Copyright (c) 2013 by Joseph Fox-Rabinovitz * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ public class Main { public static final int QWORD_BITS = 64; public static final int DWORD_BITS = 32; public static final int WORD_BITS = 16; public static final int BYTE_BITS = 8; public static final int INT_WORD_MASK = 0xFFFF; public static final int INT_BYTE_MASK = 0xFF; public static String binaryString(byte aByte) { return binaryString(aByte, null); } public static String binaryString(byte aByte, boolean prefix) { return binaryString(aByte, prefix ? "b0" : null); } public static String binaryString(byte aByte, String prefix) { StringBuilder sb = new StringBuilder(BYTE_BITS); do { sb.append((aByte & 1) == 1 ? "1" : "0"); aByte = (byte) ((aByte & INT_BYTE_MASK) >>> 1); } while (aByte != 0); sb.reverse(); if (prefix != null) sb.insert(0, prefix); return sb.toString(); } public static String binaryString(short aWord) { return binaryString(aWord, null); } public static String binaryString(short aWord, boolean prefix) { return binaryString(aWord, prefix ? "b0" : null); } public static String binaryString(short aWord, String prefix) { StringBuilder sb = new StringBuilder(WORD_BITS); do { sb.append((aWord & 1) == 1 ? "1" : "0"); aWord = (short) ((aWord & INT_WORD_MASK) >>> 1); } while (aWord != 0); sb.reverse(); if (prefix != null) sb.insert(0, prefix); return sb.toString(); } public static String binaryString(int aDWord) { return binaryString(aDWord, null); } public static String binaryString(int aDWord, boolean prefix) { return binaryString(aDWord, prefix ? "b0" : null); } public static String binaryString(int aDWord, String prefix) { StringBuilder sb = new StringBuilder(DWORD_BITS); do { sb.append((aDWord & 1) == 1 ? "1" : "0"); aDWord >>>= 1; } while (aDWord != 0); sb.reverse(); if (prefix != null) sb.insert(0, prefix); return sb.toString(); } public static String binaryString(long aQWord) { return binaryString(aQWord, null); } public static String binaryString(long aQWord, boolean prefix) { return binaryString(aQWord, prefix ? "b0" : null); } public static String binaryString(long aQWord, String prefix) { StringBuilder sb = new StringBuilder(QWORD_BITS); do { sb.append((aQWord & 1L) == 1L ? "1" : "0"); aQWord >>>= 1; } while (aQWord != 0); sb.reverse(); if (prefix != null) sb.insert(0, prefix); return sb.toString(); } }