题解 | #判断是不是字母#

import java.util.Scanner;
public class Main{
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        while(scan.hasNextLine()) {
            String str = scan.nextLine();
            if(str.matches("[a-zA-Z]")) {//正则匹配yyds!
                System.out.println(str + " is an alphabet.");
            } else {
                System.out.println(str + " is not an alphabet.");
            }
        }
    }
}