题解 | #判断各类型字符个数#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        int numbers = 0;
        int words = 0;
        int space = 0;
        int other = 0;
        Scanner scanner = new Scanner(System.in);
        String str = scanner.nextLine();

        //write your code here......
        for(int i=0; i<str.length(); i++){
            char c = str.charAt(i);
            if(Character.isLetter(c)){//检测字符是否是字母
                words++;
            }else if(Character.isDigit(c)){//检测字符是否是数字
                numbers++;
            }else if(Character.isSpaceChar(c)){//检测字符是否是空格
                space++;
            }else{
                other++;
            }
        }

        System.out.println("英文字母"+words+"数字"+numbers+"空格"+space+"其他"+other);
    }
}