Concatenates the given long[] array into one String, inserting a delimiter between each pair of elements.

     
import java.util.StringTokenizer;

/* Copyright (c) 2008 Google Inc.
 *
 * 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.
 */
//package com.google.gdata.util.common.base;


/**
 * Some common string manipulation utilities.
 */
public class Util{
    /**
     * Concatenates the given long[] array into one String, inserting a delimiter
     * between each pair of elements.
     */
    public static String joinLongs(long[] tokens, String delimiter) {
      if (tokens == null) return "";
      StringBuilder result = new StringBuilder();

      for (int i = 0; i < tokens.length; i++) {
        if (i > 0 && delimiter != null) {
          result.append(delimiter);
        }
        result.append(String.valueOf(tokens[i]));
      }
      return result.toString();
    }
}

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Concatenates the given long[] array into one String, inserting a delimiter between each pair of elements. : Array Convert « Collections Data Structure « Java

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