读取一个在0和1000之间的整数，并将该整数的各位数字相加。例如：整数是932，各位数字之和为14。

public class ExamDemo {

       public static void main(String[] args) {

              java.util.Scanner input = new java.util.Scanner(System.in);

              System.out.print("Enter an integer between 0 and 1000: ");

              int number = input.nextInt();

              int lastDigit = number % 10;

              int remainingNumber = number / 10;

              int secondLastDigit = remainingNumber % 10;

              remainingNumber = remainingNumber / 10;

              int thirdLastDigit = remainingNumber % 10;

              int sum = lastDigit + secondLastDigit + thirdLastDigit;

              System.out.println("The sum of all digits in " + number + " is " + sum);

       }

}