Working Calculator JAVA

import java.util.Scanner;
import javax.swing.JOptionPane;
public class Cal {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub

        @SuppressWarnings("unused")
        Scanner input = new Scanner(System.in);
        float number1;
        float number2;
        float result;
        int option;

        do{

            number1 = new Float(JOptionPane.showInputDialog(null, "Input your first number."));


            number2 = new Float(JOptionPane.showInputDialog(null, "Input your second number."));

            option = new Integer(JOptionPane.showInputDialog(null," \n===== Menu =====\n<1> Add\n<2> Subtract\n<3> Multiply\n<4> Divide\n"));



            switch (option){
            case 1:
                result = number1 + number2;
                JOptionPane.showMessageDialog(null, number1 + "+" + number2 + "=" + result);
                break;

            case 2:
                result = number1 - number2;
                JOptionPane.showMessageDialog(null, number1 + "-" + number2 + "=" + result);
                break;

            case 3:
                result = number1 * number2;
                JOptionPane.showMessageDialog(null, number1 + "*" + number2 + "=" + result);
                break;

            case 4:
                result = number1 / number2;
                JOptionPane.showMessageDialog(null, number1 + "/" + number2 + "=" + result);
                break;
            default:
                JOptionPane.showMessageDialog(null, "Sorry, that option is not available!");
            }
            option = new Integer(JOptionPane.showInputDialog(null, "Would you like to continue? <1> Yes, <2> No"));
        }while (option == 1);
        JOptionPane.showMessageDialog(null, "Goodbye");

    }
}