Java List Join join(final List list, final String separator)

Description

join

License

Open Source License

Declaration

public static String join(final List<?> list, final String separator) 

Method Source Code

//package com.java2s;
/**//from  ww w.jav a  2 s. c om
 * Copyright (C) 2011 BonitaSoft S.A.
 * BonitaSoft, 32 rue Gustave Eiffel - 38000 Grenoble
 * 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 2.0 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.List;

public class Main {
    public static String join(final List<?> list, final String separator) {
        return join(list, separator, separator, "", "");
    }

    public static String join(final List<?> list, final String separator, final String lastSeparator) {
        return join(list, separator, lastSeparator, "", "");
    }

    public static String join(final List<?> list, final String separator, final String lastSeparator,
            final String itemPrefix, final String itemSuffix) {
        if (list == null || list.isEmpty()) {
            return "";
        }

        final StringBuilder result = new StringBuilder();
        for (int i = 0; i < list.size(); i++) {
            final Object item = list.get(i);
            if (item != null) {
                if (i == list.size() - 1 && list.size() > 1) {
                    result.append(lastSeparator);
                } else if (i > 0) {
                    result.append(separator);
                }
                if (itemPrefix != null) {
                    result.append(itemPrefix);
                }
                result.append(item.toString());
                if (itemSuffix != null) {
                    result.append(itemSuffix);
                }
            }
        }

        return result.toString();
    }
}

Related

1. join(Collection list, String seperator)
2. join(final List list, final String conjunction)
3. join(final List toJoin)
4. join(final List list, final CharSequence delim)
5. join(final List args)
6. join(final List things, final String on)
7. join(final List