235.案例:把数组转成字符串

字符串拼接
int[] arr = {101,102,103,104,105,106};
将上面的整数型数组 拼接成以下格式,并输出
“[101,102,103,104,105,106]”

    public static void main(String[] args) {
        int[] arr = {101,102,103,104,105,106};
        String result = "[";
        for (int i = 0; i < arr.length; i++) {
            result += arr[i];
            if(i != arr.length - 1){
                result += ",";
            }else{
                result += ']';
            }
        }
        System.out.println(result);//"[101,102,103,104,105,106]"
    }