大小写转换

import java.util.Scanner;/** * Created by m1786 on 2017/3/31. */public class 大小写转换 {    public static void main(String args[]){        String str;        Scanner sc=new Scanner(System.in);        str=sc.next();        char a[]=str.toCharArray();        for(int i=0;i<str.length();i++){            if(a[i]>='A'&&a[i]<='Z')                a[i]+=32;            else                if(a[i]<='z'&&a[i]>='a')                    a[i]-=32;        }        for(int i=0;i<str.length();i++){            System.out.print(a[i]);        }    }}