你可以假设输入一定在小写字母 a ~ z 之间
public class Solution {
public static char lowercaseToUppercase(char character) {
character = (char)(character - 32);
return character;
}
public static char uppercaseTolowercase(char character){
character = (char)(character + 32);
return character;
}
public static void main(String [] args){
Scanner sc = new Scanner(System.in);
String str = sc.next();
char character = str.charAt(0);
//Solution so = new Solution();
if(character >= 'a' && character <= 'z'){
System.out.print(lowercaseToUppercase(character));
}
if(character >= 'A' && character <= 'Z'){
System.out.print(uppercaseTolowercase(character));
}
}
}
注意事项:如果方法为非静态方法,需要在主函数中创建类对象调用方法。
来源:CSDN
作者:不想当个程序员
链接:https://blog.csdn.net/A_Tu_daddy/article/details/103533381