java中字符统计试题示例

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。  

import java.util.*;

public class lianxi07 {

public static void main(String[] args) {

int digital = 0;

int character = 0;

int other = 0;

int blank = 0;

     char[] ch = null;

     Scanner sc = new Scanner(System.in);

     String s = sc.nextLine();

     ch = s.toCharArray();

     for(int i=0; i<ch.length; i++) {

      if(ch >= '0' && ch <= '9') {

       digital ++;

      } else if((ch >= 'a' && ch <= 'z') || ch > 'A' && ch <= 'Z') {

       character ++;

      } else if(ch == ' ') {

       blank ++;

      } else {

       other ++;

      }

      }

     System.out.println("数字个数: " + digital);

     System.out.println("英文字母个数: " + character);

     System.out.println("空格个数: " + blank);

     System.out.println("其他字符个数:" + other );

}

}