Java语言怎么做这道题

Question

https://ac.nowcoder.com/acm/problem/22006 牛客网上的一道题 四舍五入

Answer 1

while (true){
            System.out.print("请输入(输入-1结束)：");
            Scanner in = new Scanner(System.in);
            String next = in.next();
            if (next.equals("-1")){
                break;
            }
            Integer[] szNum = new Integer[next.length()];
            for (int a = 0; a < next.length(); a++){
                szNum[a] = Integer.parseInt(next.substring(a, a + 1));
            }
            for (int x = szNum.length - 1; x > -1; x--){
                if (szNum[x] > 4 && x > 0){
                    szNum[x - 1] = szNum[x - 1] + 1;
                    szNum[x] = 0;
                }else{
                    if (x == szNum.length - 1){
                        szNum[x] = 0;
                    }
                    break;
                }
            }
            String num = "";
            for (Integer integer : szNum) {
                num += integer;
            }
            System.out.println(Arrays.toString(szNum));
            System.out.println("最终数字：" + num);
        }

试下这个，可以在int数值的范围内无线向上四舍五入