Java Program to change UpperCase character to LowerCase character and vice-versa in a String

This Java Program will change UpperCase character to LowerCase character and LowerCase character to UpperCase For eg,ADfg to adFG and CAt to caT 

Sample Input 1

ADfg

Sample Output 1

adFG

Sample Input 2

CAt

Sample Output 2

caT

Java

import java.util.*;
public class Main {
    public static void main(String args[]) {
        Scanner sc=new Scanner(System.in);
        String str=sc.next();
        toggle(str);
    }
    public static void toggle(String str) 
    {
        for(int i=0;i<str.length();i++)
        {
            int n=str.charAt(i);
            if(n>=65 && n<=90)
            {
                n=n+32;
                char ch=(char)n;
                System.out.print(ch);
                
            }
            else
            {
               n=n-32;
               char ch=(char)n;
               System.out.print(ch);
            }
        }
    }
}