Print alphabets and numerals on screen using Java

Here is the Java code which print the alphabets and numerals.

import java.io.BufferedReader;
import java.io.InputStreamReader;
public class Demo {
    public static void main(String args[]) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System. in ));
        System.out.println("1-Want to print capital alphabets..?");
        System.out.println("2-Want to print small alphabets..?");
        System.out.println("3-Want to print numerals..?");
        System.out.println();
        System.out.print("Select any option: ");
        int select = Integer.parseInt(br.readLine());
        switch (select) {
            case 1:
                char CH;
                for (CH = 'A'; CH <= 'Z'; CH++)
                System.out.println(CH);
                break;
            case 2:
                char ch;
                for (ch = 'a'; ch <= 'z'; ch++)
                System.out.println(ch);
                break;
            case 3:
                int num, i;
                BufferedReader in = new BufferedReader(new InputStreamReader(System. in ));
                System.out.print("Please enter the limit: ");
                i = Integer.parseInt(br.readLine());
                for (num = 0; num <= i; num++)
                System.out.println(num);
            default:
                System.out.println("Wrong choice");
        }
    }
}

Thank you, keep learning and sharing.