Java ArrayList Create newArrayOfEmptyArrayList(int len)

Description

Create an array of len empty ArrayLists.

License

Open Source License

Parameter

Parameter	Description
T	Type the list elements have
len	array size

Return

new array of ArrayLists

Declaration

@SuppressWarnings({ "unchecked", "rawtypes" })
public static <T> ArrayList<T>[] newArrayOfEmptyArrayList(int len) 

Method Source Code

//package com.java2s;
/*//from w ww  .  j ava  2  s. com
 This file is part of ELKI:
 Environment for Developing KDD-Applications Supported by Index-Structures

 Copyright (C) 2013
 Ludwig-Maximilians-Universit?t M?nchen
 Lehr- und Forschungseinheit f?r Datenbanksysteme
 ELKI Development Team

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU Affero 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 Affero General Public License for more details.

 You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.util.ArrayList;

public class Main {
    /**
     * Create an array of <code>len</code> empty ArrayLists.
     * 
     * This is a common unchecked cast we have to do due to Java Generics
     * limitations.
     * 
     * @param <T> Type the list elements have
     * @param len array size
     * @return new array of ArrayLists
     */
    @SuppressWarnings({ "unchecked", "rawtypes" })
    public static <T> ArrayList<T>[] newArrayOfEmptyArrayList(int len) {
        ArrayList[] result = new ArrayList[len];
        for (int i = 0; i < len; i++) {
            result[i] = new ArrayList<>();
        }
        return result;
    }
}

Related

1. newArrayList(T... objs)
2. newArrayList(X... args)
3. newArrayListOnNull(List list)
4. newArrayListSized(Iterable fromSize)
5. newArrayListWithCapacity(int initSize)
6. sizedArrayList(final int size)
7. sizedArrayList(int capacity)
8. stringToArrayList(String s, String sep)
9. stringToArrayList(String string)