package ss1;
/** * 需求:把数组中的数据按照指定格式拼接成一个字符串 */ public class Menu { public static void main(String[] args) { int [] arr = {1,2,3}; String s =""; s += "["; for (int i = 0; i < arr.length; i++) { if (i == arr.length-1) { s += arr[i]; s += "]"; }else{ s += arr[i]; s += ", "; } } System.out.println(s); } } 结果: [1, 2, 3]
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