Java Collection Join join(String delim, Collection values)

Description

join

License

Apache License

Declaration

public static CharSequence join(String delim, Collection<?> values) 

Method Source Code

//package com.java2s;
/* ------------------------------------------------------------------------
 * $Id$//from  w ww.  j  a  v  a2  s. c o m
 * Copyright 2009 Tim Vernum
 * ------------------------------------------------------------------------
 * 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.Arrays;
import java.util.Collection;
import java.util.Iterator;

public class Main {
    public static CharSequence join(String delim, Object[] values) {
        return join(delim, Arrays.asList(values));
    }

    public static CharSequence join(String delim, Collection<?> values) {
        if (values.isEmpty()) {
            return "";
        }

        Iterator<?> iterator = values.iterator();
        if (values.size() == 1) {
            return iterator.next().toString();
        }

        StringBuilder builder = new StringBuilder();
        builder.append(iterator.next());
        while (iterator.hasNext()) {
            builder.append(delim);
            builder.append(iterator.next());
        }
        return builder;
    }
}

Related

1. join(Iterable collection, String delimiter)
2. join(Iterable collection)
3. join(String c, Collection d)
4. join(String delim, Collection list)
5. join(String delim, Collection col)
6. join(String delim, Collection collections)
7. join(String delim, Collection values)
8. join(String delimeter, Collection items)
9. join(String delimiter, Collection objects)