根据提示输入一行字符，这行字符可以是任意的，可以包含字母数字标点符号，特殊符号等，java程序会输出你输入字符串中各个类别字符的个数。

结果展示

代码展示

package com.one;import java.util.*;public class Flqgs {public static Scanner input = new Scanner(System.in);public static void main(String[] args) {System.out.println("请输入一行字符串：");String num = input.nextLine();int digital = 0, character = 0, other = 0, blank = 0;char [] ch = num.toCharArray();for(int i=0;i<ch.length;i++){if(ch[i] >= 'a' && ch[i] <= 'z' || ch[i] >= 'A' && ch[i] <= 'z'){character++;}else if(ch[i] >= '0' && ch[i] <= '9'){digital++;}else if(ch[i] == ' '){blank++;}else{other++;}}System.out.println("字母个数："+character);System.out.println("数字个数："+digital);System.out.println("空格个数："+blank);System.out.println("其他个数："+other);}}

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