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Java 将数组转换为默认分隔符（逗号分隔符）分隔的字符串
将数组转换为默认分隔符（逗号分隔符）分隔的字符串
实例源码：
源代码：
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/** from 3
N o w J a v a . c o m - 时 代 Java**/4
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//package com.nowjava;6
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public class Main {9
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public static void main(String[] argv) throws Exception {11
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char[] arr = new char[] { 'b', 'o', 'o', 'k', '2', 's', '.', 'c',13
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'o', 'm', 'a', '1', };15
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System.out.println(arrayAsString(arr));17
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}19
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public static String arrayAsString(final char[] arr) throws Exception {22
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return arrayAsString(arr, null);25
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}27
/*from 时 代 J a v a - N o w J a v a . c o m*/28
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public static String arrayAsString(final char[] arr,30
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final String delimiter) throws Exception {32
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final StringBuilder str = new StringBuilder();35
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final int lastIndx = arr.length - 1;38
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if (lastIndx == -1)40
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return "[]";42
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// str.append( "[" );44
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for (int i = 0;; i++) {47
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str.append(arr[i]);49
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if (i == lastIndx)51
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// return str.append( "]" ).toString();53
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return str.toString();55
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str.append(delimiter != null ? delimiter.toString() : ", ");57
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}59
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}61
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/**64
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* convert the array into string separated by default delimiter which is comma separator66
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*68
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* @param arr70
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* @return72
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* @throws Exception74
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*/76
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public static String arrayAsString(final int[] arr) throws Exception {78
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return arrayAsString(arr, null);81
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}83
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/**86
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* convert the array into string separated by the delimiter88
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*90
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* @param arr92
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* @param delimiter94
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* @return96
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* @throws Exception98
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*/100
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public static String arrayAsString(final int[] arr,102
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final String delimiter) throws Exception {104
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final StringBuilder str = new StringBuilder();107
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final int lastIndx = arr.length - 1;110
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