Java ArrayList Create createArrayList(E... array)

Description

create Array List

License

Open Source License

Return

a new from given array (a null array is considered like it's an empty one).

Declaration

@SafeVarargs
public static <E> ArrayList<E> createArrayList(E... array) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2007 DSource.org and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors://from   w w w . jav a 2  s.  c  o m
 *     Bruno Medeiros - initial implementation
 *******************************************************************************/

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;

import java.util.List;

public class Main {
    /** @return a new {@link ArrayList} from given collection 
     * (a null collection is considered as if it's an empty one). */
    public static <E> ArrayList<E> createArrayList(Collection<? extends E> collection) {
        return new ArrayList<E>(collection == null ? Collections.EMPTY_LIST : collection);
    }

    /** @return a new {@link ArrayList} from given array (a null array is considered like it's an empty one). */
    @SafeVarargs
    public static <E> ArrayList<E> createArrayList(E... array) {
        ArrayList<E> newCollection = new ArrayList<E>();
        if (array != null) {
            Collections.addAll(newCollection, array);
        }
        return newCollection;
    }

    public static <E, T extends List<? super E>> T addAll(T coll, Collection<E> other) {
        coll.addAll(other);
        return coll;
    }
}

Related

1. asArrayList(Collection list)
2. asArrayList(Collection collection)
3. createArrayList()
4. createArrayList()
5. createArrayList(Collection arg)
6. createArrayList(final DataType first, final DataType second)
7. createArrayList(Iterable items, int size)
8. createArrayList(Object[] a)
9. createArrayList(String[] a)