输入一行字符，分别统计出其中英文字母、空格、数字和其它字符的个数

 1 package com.li.FiftyAlgorthm;
 2 
 3 import java.util.Scanner;
 4 
 5 /**
 6  * 题目：输入一行字符，分别统计出其中英文字母、空格、数字和其它字符的个数。 
 7  * 
 8  * 程序分析：利用while语句,条件为输入的字符不为 ‘\n ‘
 9  * @author yejin
10  */
11 public class CharacterStatistics {
12     static int digital = 0;
13     static int character = 0;
14     static int other = 0;
15     static int blank = 0;
16 
17     public static void main(String[] args) {
18         char[] ch = null;
19         Scanner sc = new Scanner(System.in);
20         String s = sc.nextLine();
21         ch = s.toCharArray();
22 
23         for (int i = 0; i < ch.length; i++) {
24             if (ch[i] >= ‘0‘ && ch[i] <= ‘9‘) {
25                 digital++;
26             } else if ((ch[i] >= ‘a‘ && ch[i] <= ‘z‘) || ch[i] > ‘A‘
27                     && ch[i] <= ‘Z‘) {
28                 character++;
29             } else if (ch[i] == ‘ ‘) {
30                 blank++;
31             } else {
32                 other++;
33             }
34 
35         }
36         System.out.println("数字个数: " + digital);
37         System.out.println("英文字母个数: " + character);
38         System.out.println("空格个数: " + blank);
39         System.out.println("其他字符个数:" + other);
40     }
41 }