输入一个字符串,将其中的大写字母改为小写字母,小写字母改为大写字母,然后输出
我的程序是 :::
  import java.util.Scanner;
class Ti62{
   public static void main(String args[]){
Scanner sc=new Scanner(System.in);
System.out.println("请输入一段字符串");
String s=sc.next();
int a=s.length();String b[]=new String[a+1];String c[]=new String[a+1];
char d[]=new char[a+1];
 for (int i=0;i<=a;i++){
  d[i]=s.charAt(i);
   if(d[i]>='a'){
                      b[i]=String.valueOf(d[i] );
                            c[i]=b[i].toUpperCase();
                        
                    }
 else              {
                      b[i]=String.valueOf(d[i] ); 
                       c[i]=b[i].toLowerCase(); 
                         
                    }
System.out.print(c[i]);
}
}}