【二十一】Java大小写转换

版权声明：转载注明出处 https://blog.csdn.net/jy02268879/article/details/81676913

字符小写转大写

import java.util.Scanner;

public class CharacterLowToUp {
    public static void main(String[] args) {
        System.out.println("请输入一个字符");
        Scanner s = new Scanner(System.in);
        char n = s.next().charAt(0);
        System.out.println(LowToUp(n));
    }

    public static char LowToUp(char n){
        if(Character.isLowerCase(n)){
            return Character.toUpperCase(n);
        }else{
            return n;
        }
    }
}