Here you can find the source of bytes2HexString(byte[] b)
public static String bytes2HexString(byte[] b)
//package com.java2s; /**/*from w w w . j a v a2 s . c o m*/ * Copyright 2016 smartbetter * * 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 bytes2HexString(byte[] b) { if (b.length == 0) { return null; } StringBuilder sb = new StringBuilder(""); for (int i = 0; i < b.length; i++) { int value = b[i] & 0xFF; String hv = Integer.toHexString(value); if (hv.length() < 2) { sb.append(0); } sb.append(hv); } return sb.toString(); } }