Java Collection Join join(Collection elements, String separator)

Description

join

License

Open Source License

Declaration

public static String join(Collection elements, String separator) 

Method Source Code

//package com.java2s;
/*/*from  w ww .j a v  a 2s .  c o  m*/
 * BitThief - A Free Riding BitTorrent Client
 * Copyright (C) 2006 Patrick Moor <patrick@moor.ws>
 *
 * 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 */

import java.util.Collection;

public class Main {
    public static String join(Collection elements, String separator) {
        if (elements == null) {
            throw new NullPointerException();
        }
        if (separator == null) {
            separator = "";
        }

        boolean first = true;
        StringBuilder stringBuilder = new StringBuilder();
        for (Object element : elements) {
            if (!first) {
                stringBuilder.append(separator);
            } else {
                first = false;
            }
            stringBuilder.append(element);
        }
        return stringBuilder.toString();
    }
}

Related

1. join(Collection collection, String separator)
2. join(Collection collection, String separator)
3. join(Collection collection, String separator)
4. join(Collection collection, String separator, boolean trailing)
5. join(Collection data)
6. join(Collection items)
7. join(Collection list, char separator)
8. join(Collection lst, String delim)
9. join(Collection objects, String glue)