package com.hezhikeji.controller;

public class Test {

    //首字母轉小寫
    public static String toLowerCaseFirstOne(String s)
    {
        if(Character.isLowerCase(s.charAt(0)))
            return s;
        else
            return (new StringBuilder()).append(Character.toLowerCase(s.charAt(0))).append(s.substring(1
 
)).toString();
    }
    //首字母轉大寫
    public static String toUpperCaseFirstOne(String s)
    {
        if(Character.isUpperCase(s.charAt(0)))
            return s;
        else
            return (new StringBuilder()).append(Character.toUpperCase(s.charAt(0))).append(s.substring(1)).toString();
    }

    public
 
 static void main(String[] args) {
        //輸出test
        System.out.println(toLowerCaseFirstOne("test"));
        //輸出test
        System.out.println(toLowerCaseFirstOne("Test"));
        //輸出Test
        System.out.println(toUpperCaseFirstOne("test"));
        //輸出Test
        System.out.println(toUpperCaseFirstOne("Test"
 
));
    }

}