Here you can find the source of lastIndexOf(byte[] array, byte valueToFind)
public static int lastIndexOf(byte[] array, byte valueToFind)
//package com.java2s; /*//from w ww.j a v a2s .c o m * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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 { /** * The index value when an element is not found in a list or array: <code>-1</code>. This value is returned by methods in this class and can also be used in comparisons with values returned by various method from {@link java.util.List}. */ public final static int INDEX_NOT_FOUND = -1; public static int lastIndexOf(byte[] array, byte valueToFind) { return lastIndexOf(array, valueToFind, Integer.MAX_VALUE); } public static int lastIndexOf(byte[] array, byte valueToFind, int startIndex) { if (array == null) { return INDEX_NOT_FOUND; } if (startIndex < 0) { return INDEX_NOT_FOUND; } else if (startIndex >= array.length) { startIndex = array.length - 1; } for (int i = startIndex; i >= 0; i--) { if (valueToFind == array[i]) { return i; } } return INDEX_NOT_FOUND; } }