Here you can find the source of arrayToString(String[] values)
public static String arrayToString(String[] values)
//package com.java2s; /*/*w w w . jav a 2 s. c o m*/ * Copyright 1999-2101 Alibaba Group. * * 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. */ public class Main { public static String arrayToString(String[] values) { StringBuilder paramsString = new StringBuilder(); for (int i = 0; i < values.length; i++) { if (i == 0) { paramsString.append(values[i]); } else { paramsString.append(","); paramsString.append(values[i]); } } return paramsString.toString(); } }