Java Collection Last getLastElement(Collection collection, T defaultValue)

Description

Method which will return the "last" element in the given collection or a null value if not found.

License

Apache License

Parameter

Parameter	Description
T	generic collection type
collection	collection to be checked
defaultValue	default value if list is empty

Return

last element or default value

Declaration

public static <T> T getLastElement(Collection<T> collection, T defaultValue) 

Method Source Code

//package com.java2s;
/*//ww  w  .ja  v a2 s. co m
 * Copyright [1999-2015] Wellcome Trust Sanger Institute and the EMBL-European Bioinformatics Institute
 * Copyright [2016-2018] EMBL-European Bioinformatics Institute
 * 
 * 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.
 */

import java.util.Collection;

import java.util.List;

public class Main {
    /**
     * Method which will return the "last" element in the given collection or a
     * null value if not found.
     * 
     * @param <T>
     *            generic collection type
     * @param collection
     *            collection to be checked
     * @param defaultValue
     *            default value if list is empty
     * @return last element or default value
     */
    public static <T> T getLastElement(Collection<T> collection, T defaultValue) {
        T elem = defaultValue;
        if (collection != null && !collection.isEmpty()) {
            if (List.class.isAssignableFrom(collection.getClass())) {
                elem = ((List<T>) collection).get(collection.size() - 1);
            } else {
                for (T item : collection) {
                    elem = item;
                }
            }
        }
        return elem;
    }
}

Related

1. getLast(Collection c)
2. getLastElement(final Collection collection)
3. getLastOfCollection(Collection collection)
4. getLastOrNull(Collection collection)
5. implodeCollection(Collection items, String prefix, String suffix, String delimiter, String lastItemSuffix)