How to Get Logarithm and Power Values of Numbers using JAVA

import java.util.Scanner;
import java.io.*;
public class Demo {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System. in ));
        System.out.println("1-Want logarithm value of a number..?");
        System.out.println("2-Want power of a number..?");
        System.out.println();
        System.out.print("Select any option: ");
        int select = Integer.parseInt(br.readLine());
        switch (select) {
            case 1:
                System.out.print("Enter the number: ");
                Scanner in = new Scanner(System. in );
                float input = in .nextFloat();
                System.out.println("Natural logarithm value of " + input + " is : " + Math.log(input));
                break;
            case 2:
                System.out.print("Enter the number: ");
                Scanner s = new Scanner(System. in );
                int input1 = s.nextInt();
                System.out.print("Enter the power value: ");
                int input2 = s.nextInt();
                System.out.println("The value of " + input1 + " raised to the power " + input2 + " is: " + Math.pow(input1, input2));
                break;
        }
    }
}