最后第三题才想出来怎么输入

  Scanner scanner = new Scanner(System.in);
  String input = scanner.nextLine();
  input = input.substring(1, input.length() - 1); if(input!=""){
      String[] strNums = input.split(", "); int[] nums = new int[strNums.length]; for(int i=0;i<nums.length;i++){
          nums[i]=Integer.parseInt(strNums[i]);
      }
      System.out.println(handle(nums));
  } else {
    System.out.println(0);
  }