Java Collection Join join(Collection collection, String separator)

Description

Joins strings with the separator.

License

Apache License

Parameter

Parameter	Description
collection	the collection
separator	the separator

Return

a string joined with the separator

Declaration

public static String join(Collection<String> collection, String separator) 

Method Source Code

//package com.java2s;
/*/*from   w ww  .  j a v  a 2 s.  c om*/
 * Copyright 2004-2010 the Seasar Foundation and the Others.
 *
 * 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.Collection;

public class Main {
    /**
     * Joins strings with the separator.
     * 
     * @param collection
     *            the collection
     * @param separator
     *            the separator
     * @return a string joined with the separator
     */
    public static String join(Collection<String> collection, String separator) {
        if (collection == null) {
            throw new NullPointerException("The collection parameter is null.");
        }
        if (separator == null) {
            throw new NullPointerException("The separator parameter is null.");
        }
        StringBuilder buf = new StringBuilder();
        for (String s : collection) {
            buf.append("\"");
            buf.append(s);
            buf.append("\"");
            buf.append(separator);
        }
        if (buf.length() > 0) {
            buf.setLength(buf.length() - separator.length());
        }
        return buf.toString();
    }
}

Related

1. join(Collection collection)
2. join(Collection collection)
3. join(Collection collection, String separator)
4. join(Collection collection, String separator)
5. join(Collection collection, String separator)
6. join(Collection elements)
7. join(Collection in, String joinS)
8. join(Collection items)
9. join(Collection items, String join)