Java program create a simple calculater program

This programme is important for a simple calculater program

 java.util.Scanner;

public class Calculator {

  public static void main(String[] args) {

    Scanner scanner = new Scanner(System.in);

    System.out.println("Enter the first number:");

    double num1 = scanner.nextDouble();

    System.out.println("Enter the second number:");

    double num2 = scanner.nextDouble();

    System.out.println("Enter the operator (+, -, *, /):");

    char operator = scanner.next().charAt(0);

    double result;

    switch(operator) {

      case '+':

        result = num1 + num2;

        break;

      case '-':

        result = num1 - num2;

        break;

      case '*':

        result = num1 * num2;

        break;

      case '/':

        result = num1 / num2;

        break;

      default:

        System.out.println("Invalid operator");

        return;

    }

    System.out.println("The result is: " + result);

  }

}