Java List Last Item getLast(List list)

Description

get Last

License

Apache License

Return

the last item in the list if exists; otherwise, null .

Declaration

static public <T> T getLast(List<T> list) 

Method Source Code

//package com.java2s;
/**/*from  ww w. java2s  .  c om*/
 * Copyright 2014, Emory University
 * 
 * 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.List;

public class Main {
    /** @return the last item in the list if exists; otherwise, {@code null}. */
    static public <T> T getLast(List<T> list) {
        return list.isEmpty() ? null : list.get(list.size() - 1);
    }

    /** @return the index'th item if exists; otherwise, {@code null}. */
    static public <T> T get(List<T> list, int index) {
        return isRange(list, index) ? list.get(index) : null;
    }

    /** @return the index'th item if exists; otherwise, {@code null}. */
    static public <T> T get(T[] array, int index) {
        return isRange(array, index) ? array[index] : null;
    }

    static public <T> boolean isRange(List<T> list, int index) {
        return 0 <= index && index < list.size();
    }

    static public <T> boolean isRange(T[] array, int index) {
        return 0 <= index && index < array.length;
    }
}

Related

1. getLast(List list)
2. getLast(List list)
3. getLast(List list)
4. getLast(List list)
5. getLast(List list)
6. getLast(List source)
7. getLast(List list)
8. getLastBefore(List list)
9. getLastDateFromTimeSeriesDeltas(Double xAxisStart, List xAxisDeltas)