Java List Copy copy(List original)

Description

copy

License

Open Source License

Declaration

public static <T> ArrayList<T> copy(List<T> original) 

Method Source Code

//package com.java2s;
/*//from   w w  w . j  a  v a  2  s. com
 * Hello Minecraft!.
 * Copyright (C) 2013  huangyuhui <huanghongxun2008@126.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see {http://www.gnu.org/licenses/}.
 */

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;
import java.util.Map;

public class Main {
    public static <T> ArrayList<T> copy(List<T> original) {
        if (original == null)
            return null;
        ArrayList<T> ret = new ArrayList<>(original.size());
        for (T x : original)
            ret.add(x);
        return ret;
    }

    public static <K, V> Map<K, V> copy(Map<K, V> original) {
        if (original == null)
            return null;
        HashMap<K, V> ret = new HashMap<>(original.size());
        for (HashMap.Entry<K, V> x : original.entrySet())
            ret.put(x.getKey(), x.getValue());
        return ret;
    }
}

Related

1. copy(List master)
2. copy(List source, int index)
3. copy(List list)
4. copy(List list)
5. copy(List list)
6. copy(List toCopy)
7. copy(List toCopy)
8. copy(List[] sourceLists, List[] destLists)
9. copyAndClearList(List sourceList)