Java List Last Item isLastIndex(List list, int index)

Description

is Last Index

License

Apache License

Parameter

Parameter	Description
list	a parameter
index	the index in question

Return

true if it is the last index or if list is empty and -1 is passed for the index param

Declaration

public static boolean isLastIndex(List<?> list, int index) 

Method Source Code

//package com.java2s;
/*/* w  w  w.  j  a  v a  2s  . c  om*/
 * 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.
 */

import java.util.Collection;

import java.util.List;

public class Main {
    /**
     * @param list
     * @param index the index in question
     * @return true if it is the last index or if list is empty and -1 is passed for the index param
     */
    public static boolean isLastIndex(List<?> list, int index) {
        return index == getLastIndex(list);
    }

    /**
     * @param list any list
     * @return -1 if list is empty, otherwise the max index
     */
    public static int getLastIndex(List<?> list) {
        if (isEmpty(list)) {
            return -1;
        }
        return list.size() - 1;
    }

    /*************************** empty ****************************************/

    public static <T> boolean isEmpty(Collection<T> collection) {
        return collection == null || collection.isEmpty();
    }
}

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