Toggle string in java.

package program;

import java.util.Scanner;

public class code{

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.println("enter string=");

StringBuilder sb = new StringBuilder(sc.nextLine());

for(int i=0; i<sb.length(); i++){

    int as=sb.charAt(i);

    if(as>=65 && as<=90){

        as+=32;

        sb.setCharAt(i,(char)as);

    }else if(as>=97 && as<=122){

        as-=32;

        sb.setCharAt(i,(char)as);

    }

}

System.out.println("Toggle string is="+sb);

}  

}