Java Collection to String stringify(Collection collection)

Description

Converts the given collection to a collection of strings by calling toString() on each item.

License

Open Source License

Parameter

Parameter	Description
collection	The collection to convert.
E	The type of item held by the given collection.

Return

A collection of the given items converted to strings.

Declaration

public static <E> Collection<String> stringify(Collection<E> collection) 

Method Source Code

//package com.java2s;
/*//  w  w w . j a  v a  2  s  . c  o m
 * The MIT License (MIT)
 *
 * Copyright (c) 2016 Lachlan Dowding
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

public class Main {
    /**
     * Converts the given collection to a collection of strings by calling toString() on each
     * item.
     *
     * @param collection    The collection to convert.
     * @param <E>           The type of item held by the given collection.
     * @return              A collection of the given items converted to strings.
     */
    public static <E> Collection<String> stringify(Collection<E> collection) {
        return stringify(collection, true);
    }

    /**
     * Converts the given collection to a collection of strings by calling toString() on each
     * item.
     *
     * @param collection    The collection to convert.
     * @param includeNulls  Whether null items should be included in the returned collection.
     * @param <E>           The type of item held by the given collection.
     * @return              A collection of the given items converted to strings.
     */
    public static <E> Collection<String> stringify(Collection<E> collection, boolean includeNulls) {
        if (collection == null)
            return null;

        List<String> output = new ArrayList<String>(collection.size());

        for (E item : collection) {
            if (includeNulls || item != null) {
                output.add(item == null ? null : item.toString());
            }
        }

        return output;
    }
}

Related

1. listToString(Collection l, String delim)
2. listToString(Collection objects)
3. listToStringArray(Collection list)
4. listToStringHelper(StringBuilder sb, String sep, Collection list)
5. stringify(Collection collection)
6. toStr(Collection collection)
7. toStr(Collection elements)
8. toString(Collection c)
9. toString(Collection c)