Java Collection to Array toLongArray(Collection collection)

License

Parameter

Exception

Return

Declaration

public static long[] toLongArray(Collection<Long> collection) 

Method Source Code

//package com.java2s;
/*/*w  ww  . j  ava2  s  . c  o  m*/
 * Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
 *
 * 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;

public class Main {
    /**
     * Converts a {@link Collection<Long>} to a primitive {@code long[]} array.
     *
     * @param collection the given collection
     * @return a primitive long[] array
     * @throws NullPointerException if collection is {@code null}
     */
    public static long[] toLongArray(Collection<Long> collection) {
        long[] collectionArray = new long[collection.size()];
        int index = 0;
        for (Long item : collection) {
            collectionArray[index++] = item;
        }
        return collectionArray;
    }
}

Related

1. toIntArray(final Collection c)
2. toIntArray(final Collection col)
3. toIntArray(final Collection collection)
4. toIntArray(final Collection values)
5. toLongArray(Collection collection)
6. toStringArray(Collection collection)
7. toStringArray(Collection collection)
8. toStringArray(Collection collection)
9. toStringArray(Collection collection)