Convert the given string into tOGGLE cASE wORD in Java

Code Snippet

//Convert the given string into tOGGLE cASE wORD in Java

public class App {
    public static void main(String[] args) {
        // Program convert the given string into tOGGLE cASE wORD
        StringBuilder a = new StringBuilder("Tutor Joes Computer Education");
        System.out.println("Original String : " + a);

        for (int i = 0; i < a.length(); i++) {
            if (a.charAt(i) >= 97 && a.charAt(i) <= 122) {
                int c = (int) a.charAt(i) - 32;
                a.setCharAt(i, (char) c);
            } else if (a.charAt(i) >= 65 && a.charAt(i) <= 90) {
                int c = (int) a.charAt(i) + 32;
                a.setCharAt(i, (char) c);
            }
        }

        System.out.println("tOGGLE cASE wORD Output : " + a);
    }
}