Simple Double Calc

import java.util.Scanner;

public class Calculator
{
   private static Scanner scan;
   public static void main (String[]args)
   {

   System.out.println("Initial Calculations being performed");
   System.out.println("1+1=2");
   System.out.println("1*1=1");
   System.out.println("1*1=1");
   System.out.println("1/1=1");
   System.out.println("Initial Calculations done");
   scan = new Scanner(System.in);

   System.out.println();
   System.out.println();
   System.out.println();
   System.out.println();
   System.out.println("Choose Operation : + - * /");

   String operation = scan.nextLine();
   System.out.println("You chose '" + operation + "'");

      if(operation.equals("+"))
      {
      System.out.println("Type in X");
      double x = scan.nextDouble();

      System.out.println("Type in Y");
      double y = scan.nextDouble();
      System.out.println(x + "+" + y + "=" + (x+y));
      }

      if(operation.equals("-"))
      {
      System.out.println("Type in X");
      double x = scan.nextDouble();

      System.out.println("Type in Y");
      double y = scan.nextDouble();
      System.out.println(x + "-" + y + "=" + (x-y));
      }

      if(operation.equals("*"))
      {
      System.out.println("Type in X");
      double x = scan.nextDouble();

      System.out.println("Type in Y");
      double y = scan.nextDouble();
      System.out.println(x + "*" + y + "=" + (x*y));
      }

      if(operation.equals("/"))
      {
      System.out.println("Type in X");
      double x = scan.nextDouble();

      System.out.println("Type in Y");
      double y = scan.nextDouble();
      System.out.println(x + "/" + y + "=" + (x/y));
      }



   }
}