Java Collection Element Get getIndexedValue(Object collection, int index)

Description

get Indexed Value

License

Apache License

Declaration

public static Object getIndexedValue(Object collection, int index) 

Method Source Code

//package com.java2s;
/*//from  ww  w . j  a v  a 2s .co m
 * Copyright 2005-2018 Dozer Project
 *
 * 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.Iterator;

public class Main {
    public static Object getIndexedValue(Object collection, int index) {
        Object result = null;
        if (collection instanceof Object[]) {
            Object[] x = (Object[]) collection;
            if (index < x.length) {
                return x[index];
            }
        } else if (collection instanceof Collection) {
            Collection<?> x = (Collection<?>) collection;
            if (index < x.size()) {
                Iterator<?> iter = x.iterator();
                for (int i = 0; i < index; i++) {
                    iter.next();
                }
                result = iter.next();
            }
        }
        return result;
    }
}

Related

1. getFlatString(Collection elements)
2. getGivenClassObject(Collection coll, Class clazz)
3. getHighest(final Collection elements, final Comparator c)
4. getImplement(Class aClass, Collection> classCollection)
5. getIndex(Object collectionOrArray, int index)