Java Iterable Join join(Iterable elements, String separator)

Description

join

License

Apache License

Declaration

public static String join(Iterable<?> elements, String separator) 

Method Source Code

//package com.java2s;
/**/*from ww w.j av a  2  s .  c om*/
 * Copyright 2008 The University of North Carolina at Chapel Hill
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.util.Map;
import java.util.Iterator;

public class Main {
    public static String join(Iterable<?> elements, String separator) {
        if (elements == null)
            return "";
        StringBuilder buf = new StringBuilder();
        if (separator == null)
            separator = " ";

        for (Object o : elements) {
            if (buf.length() > 0)
                buf.append(separator);
            buf.append(o);
        }
        return buf.toString();
    }

    public static String join(Map<?, ?> elements, String keySeparator, String entrySeparator) {
        if (elements == null)
            return "";
        StringBuilder buf = new StringBuilder();
        if (keySeparator == null)
            keySeparator = " ";
        if (entrySeparator == null)
            entrySeparator = " ";

        Iterator<?> elementsIt = elements.entrySet().iterator();
        while (elementsIt.hasNext()) {
            if (buf.length() > 0)
                buf.append(entrySeparator);
            Map.Entry<?, ?> element = (Map.Entry<?, ?>) elementsIt.next();
            buf.append(element.getKey()).append(keySeparator).append(element.getValue());
        }
        return buf.toString();
    }
}

Related

1. join(Iterable iterable, String delimiter)
2. join(Iterable s, String delimiter)
3. join(Iterable iterable, String delimiter)
4. join(Iterable joinee, String joiner)
5. join(Iterable c, String delimeter)
6. join(Iterable elements, String separator)
7. join(Iterable elements, String separator)
8. join(Iterable items)
9. join(Iterable items)