Java编程——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 import java.util.*;
 2 public class lianxi07 {
 3 public static void main(String[] args) {
 4 int digital = 0;
 5 int character = 0;
 6 int other = 0;
 7 int blank = 0;
 8      char[] ch = null;
 9      Scanner sc = new Scanner(System.in);
10      String s = sc.nextLine();
11      ch = s.toCharArray();
12      for(int i=0; i<ch.length; i++) {
13       if(ch >= '0' && ch <= '9') {
14        digital ++;
15       } else if((ch >= 'a' && ch <= 'z') || ch > 'A' && ch <= 'Z') {
16        character ++;
17       } else if(ch == ' ') {
18        blank ++;
19       } else {
20        other ++;
21       }
22       }
23      System.out.println("数字个数: " + digital);
24      System.out.println("英文字母个数: " + character);
25      System.out.println("空格个数: " + blank);
26      System.out.println("其他字符个数:" + other );
27 }
28 }