Java Collection Join join(String sep, Collection strs)

Description

Join the string collection into one single string by the separator.

License

Apache License

Parameter

Parameter	Description
sep	the separator
strs	the collection of string

Return

the result string

Declaration

public static final String join(String sep, Collection<String> strs) 

Method Source Code

//package com.java2s;
/**/*from   w w  w.j a v a 2 s . c om*/
 * StringUtil.java
 *
 * Copyright 2012 Niolex, Inc.
 *
 * Niolex licenses this file to you 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;
import java.util.Iterator;

public class Main {
    /**
      * Join the string array into one single string by the separator.
      *
      * @param sep the separator
      * @param strs the string array
      * @return the result string
      */
    public static final String join(String sep, String... strs) {
        return join(strs, sep);
    }

    /**
     * Join the string array into one single string by the separator.
     *
     * @param strs the string array
     * @param sep the separator
     * @return the result string
     */
    public static final String join(String[] strs, String sep) {
        if (strs == null || strs.length == 0) {
            return "";
        }
        StringBuilder sb = new StringBuilder();
        sb.append(strs[0]);
        for (int i = 1; i < strs.length; ++i) {
            sb.append(sep).append(strs[i]);
        }
        return sb.toString();
    }

    /**
      * Join the string collection into one single string by the separator.
      *
      * @param sep the separator
      * @param strs the collection of string
      * @return the result string
      */
    public static final String join(String sep, Collection<String> strs) {
        return join(strs, sep);
    }

    /**
     * Join the string collection into one single string by the separator.
     *
     * @param strs the collection of string
     * @param sep the separator
     * @return the result string
     */
    public static final String join(Collection<String> strs, String sep) {
        if (strs == null || strs.size() == 0) {
            return "";
        }
        StringBuilder sb = new StringBuilder();
        Iterator<String> it = strs.iterator();
        sb.append(it.next());
        while (it.hasNext()) {
            sb.append(sep).append(it.next());
        }
        return sb.toString();
    }
}

Related

1. join(String sep, Collection col)
2. join(String sep, Collection parts)
3. join(String sep, Collection values)
4. join(String sep, Collection values)
5. join(String sep, Collection strings)
6. join(String separator, Collection c)
7. join(String separator, Collection c)
8. join(String separator, Collection items)
9. join(String separator, Collection items)