Here you can find the source of lastIndexOf(byte[] s, char c)
public static int lastIndexOf(byte[] s, char c)
//package com.java2s; /*//w ww.j a va2s . c om Copyright (c) 2002, 2014, Oracle and/or its affiliates. All rights reserved. The MySQL Connector/J is licensed under the terms of the GPLv2 <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors. There are special exceptions to the terms and conditions of the GPLv2 as it is applied to this software, see the FLOSS License Exception <http://www.mysql.com/about/legal/licensing/foss-exception.html>. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ public class Main { public static int lastIndexOf(byte[] s, char c) { if (s == null) { return -1; } for (int i = s.length - 1; i >= 0; i--) { if (s[i] == c) { return i; } } return -1; } }