Conversion of Celsius to Fahrenheit and Vice Versa using JAVA

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Scanner;
class Demo {
    public static void main(String[] args) throws Exception {
        float Ctemperature, Ftemperature;
        Scanner in = new Scanner(System. in );
        BufferedReader br = new BufferedReader(new InputStreamReader(System. in ));
        System.out.println("1-Celsius to Fahrenheit..?");
        System.out.println("2-Fahrenheit to Celsius..?");
        System.out.println();
        System.out.print("Select any option: ");
        int select = Integer.parseInt(br.readLine());
        switch (select) {
            case 1:
                System.out.print("Enter temperatue in Celsius: ");
                Ctemperature = in .nextInt();
                Ftemperature = (Ctemperature * 9) / 5 + 32;
                System.out.println("Temperatue in Fahrenheit = " + Ftemperature);
                break;
            case 2:
                System.out.print("Enter temperatue in Fahrenheit: ");
                Ftemperature = in .nextInt();
                Ctemperature = ((Ftemperature - 32) * 5) / 9;
                System.out.println("Temperatue in Celsius = " + Ctemperature);
                break;
            default:
                System.out.println("Wrong choice :(");
        }
    }
}