java输入格式

如何接受输入的数值？格式应该怎么写？谢谢哦！

BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));

String str = stdIn.readLine()

int a = Integer.parseInt(str);

package maintest;

import java.util.arrays; import java.util.scanner;

public class maintest {

 public static void main(string[] args) {   int[] numbers = null;   system.out.println("请输入用英文逗号分割的数字字符串：");   string s = new scanner(system.in).next();   string[] snumbers = s.split(","); // 逗号分隔

  numbers = new int[snumbers.length]; // 动态生成数组

  // 赋值进去:   for (int i = 0; i < snumbers.length; i++) {    numbers[i] = integer.parseint(snumbers[i]);   }

  arrays.sort(numbers);

  // 输出   system.out.println("输出结果：\n");   for (int i = 0; i < numbers.length; i++) {    if (i == numbers.length - 1) {     system.out.print(numbers[i]);    } else {     system.out.print(numbers[i] + ",");    }   }  } }