Here you can find the source of bin2hex(int digit)
private static int bin2hex(int digit)
//package com.java2s; /*// w w w .j a v a 2s . c om * Copyright (C) 2017 Julien Viet * * 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 int bin2hex(int digit) { final int isLessOrEqual9 = (digit - 10) >> 31; //isLessOrEqual9==0xff<->digit<=9 //bin2hexAsciiDistance=digit<=9?48:87; final int bin2hexAsciiDistance = 48 + ((~isLessOrEqual9) & 39); return digit + bin2hexAsciiDistance; } }