Java List to Array ListToArray(List list)

Description

Convert a List of Integer s to an array of ints.

License

Apache License

Parameter

Parameter	Description
list	The List to convert.

Return

an int[] or null if list is null.

Declaration

public static int[] ListToArray(List<Integer> list) 

Method Source Code

//package com.java2s;
/*//from   ww w. j av a2s  .  c  o  m
 * Copyright (C) 2013 Marten Gajda <marten@dmfs.org>
 *
 * 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 {
    /**
     * Convert a {@link List} of {@link Integer}s to an array of <code>int</code>s.
     * 
     * @param list
     *            The {@link List} to convert.
     * @return an int[] or <code>null</code> if <code>list</code> is <code>null</code>.
     */
    public static int[] ListToArray(List<Integer> list) {
        if (list == null) {
            return null;
        }

        int count = list.size();
        int[] result = new int[count];

        for (int i = 0; i < count; ++i) {
            result[i] = list.get(i);
        }

        return result;
    }
}

Related

1. listToArray(List bytes)
2. listToArray(List list)
3. listToArray(List doubles)
4. listToArray(List list)
5. listToArray(List list)
6. listToArray(List list)
7. ListToArray(List> values)
8. listToArray(List list)
9. listToArray(List stringList)