Open Various Application using JAVA

import java.io.*;
class Demo {
    public static void main(String[] args) {
        Runtime rs = Runtime.getRuntime();
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System. in ));
            System.out.println("1-Want to open notepad");
            System.out.println("2-Want to open calculator");
            System.out.println("2-Want to open control panel");
            System.out.println();
            System.out.print("Select any option: ");
            int select = Integer.parseInt(br.readLine());
            switch (select) {
                case 1:
                    rs.exec("notepad");
                    break;
                case 2:
                    rs.exec("calc");
                    break;
                case 3:
                    rs.exec("control panel");
                default:
                    System.out.println("");
            }
        } catch (IOException e) {
            System.out.println(e);
        }
    }
}