import javax.swing.JOptionPane;/* * To change this template, choose Tools | Templates * and open the template in the editor. *//** * * @author xiaolei */public class EX2_6 {    public static void main(String[] args) {        int num, sum = 0;        num = Integer.parseInt(JOptionPane.showInputDialog("輸入0-1000之間的整數(shù)："));        if((num < 0) || (num > 1000)){            JOptionPane.showMessageDialog(null, "錯誤的輸入值："+num);            System.exit(0);        }        while(num != 0){            sum += num % 10;            num = num / 10;        }                JOptionPane.showMessageDialog(null, "結(jié)果："+sum);    }}