Basic calculator in Java

CalculatorTest.java

import java.util.Scanner;

public class CalculatorTest {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.print("First Number: ");
        double firstNumber = input.nextDouble();
        System.out.print("Second Number: ");
        double secondNumber = input.nextDouble();
        Calculator calculator = new Calculator();
        calculator.setFirstNumber(firstNumber);
        calculator.setSecondNumber(secondNumber);
        calculator.add();
        calculator.subtract();
        calculator.multiply();
        calculator.divide();
        System.out.println("First Number is " + calculator.getFirstNumber());
        System.out.println("Second Number is " + calculator.getSecondNumber());
    }
}

class Calculator {
    private double firstNumber;
    private double secondNumber;
    private double sum;
    private double difference;
    private double product;
    private double quotient;

    public double getFirstNumber() {
        return firstNumber;
    }

    public void setFirstNumber(double firstNumber) {
        this.firstNumber = firstNumber;
    }

    public double getSecondNumber() {
        return secondNumber;
    }

    public void setSecondNumber(double secondNumber) {
        this.secondNumber = secondNumber;
    }

    public void add() {
        sum = firstNumber + secondNumber;
        System.out.println("The sum is " + sum);
    }

    public void subtract() {
        difference = firstNumber - secondNumber;
        System.out.println("The difference is " + difference);
    }

    public void multiply() {
        product = firstNumber * secondNumber;
        System.out.println("The product is " + product);
    }

    public void divide() {
        quotient = firstNumber / secondNumber;
        System.out.println("The quotient is " + quotient);
    }
}