Selenium Webdriver program to select date Picker

package ff;

import java.util.List;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.testng.annotations.Test;

public class DatePicker {

@Test
public void drop() throws InterruptedException
{
System.setProperty("webdriver.chrome.driver", "D:\\chromedriver.exe");
WebDriver driver=new ChromeDriver();
//driver.manage().window().maximize();
driver.get("https://www.tripadvisor.in/");
//click on date fields
driver.findElement(By.id("date_picker_in_1")).click();
//date from user which he wants to select
String date = "15-October 2016";
//Split date and month and years
String splitter[]= date.split("-");
//split month and years from date
String month_year = splitter[1];
//split Day from date
String Day_Date = splitter[0];
//get month name
String[] monthName = month_year.split(" ");
System.out.println("Month from User provided date         :"+monthName[0]);
//Month name from user's provied date
String UserMonthName =monthName[0];
//Convert month name into month number
int UserMonthNumber=ObtenerNumeroMes(UserMonthName);

System.out.println("User provided Month Number          :"+UserMonthNumber);

//String day = splitter[0];
/*System.out.println(splitter[1]);
System.out.println(splitter[0]);*/
//define Month and year object for date picker hearder
List<WebElement> monthobj=driver.findElements(By.xpath("//div[@class='calendar']/div[2][@class='month']/table/thead/tr[1]/th[@class='caption']"));
        //total number of month display there
int sizeOfmonth = monthobj.size();
       
for(int i=0;i<sizeOfmonth;i++)
        {
//display the month text display in the field
        System.out.println(driver.findElements(By.xpath("//div[@class='calendar']/div[2][@class='month']/table/thead/tr[1]/th[@class='caption']")).get(i).getText());
        //get month from application calander fields
        String getMonthFromApp = driver.findElements(By.xpath("//div[@class='calendar']/div[2][@class='month']/table/thead/tr[1]/th[@class='caption']")).get(i).getText();
        //split mmonth from years by space
        String Systemsplitter[] = getMonthFromApp.split(" ");
        //get month from
        String x=Systemsplitter[0];
        System.out.println(x);
       
        //month in calander
        int ApplicationMonthNumber=ObtenerNumeroMes(x);
        System.out.println("Month Number         :"+ApplicationMonthNumber);
        //month in expected date
        //if expected Monyh is greater than application current Month
        if(UserMonthNumber>ApplicationMonthNumber)
        {
        int m = UserMonthNumber-ApplicationMonthNumber;
        int t=m;
        for(int j=1;j<=t;j++)
        {
        System.out.println("HI");
        driver.findElement(By.xpath("//*[@class='navCal']/span[2]")).click();
        Thread.sleep(1000);
        }
       
        }
       
        //if expected Month is equal to application current Month
        else if(UserMonthNumber==ApplicationMonthNumber)
        {
        System.out.println("February");
        }
        else
        //if expected Monyh is less than application current Month the number of time click on calender
        {
       
        int m = 12-ApplicationMonthNumber;
       
        for(int j=0;j<=m;j++)
        {
       
        System.out.println("HI");
    driver.findElement(By.xpath("//*[@class='navCal']/span[2]")).click();
   
    Thread.sleep(2000);
        }
       
       
       
        }
       
        //select the day from that calender
        List<WebElement> datac=driver.findElements(By.xpath("//div[@class='calendar']/div[@class='month']/table/thead/tr/th[@class='caption']"));
       
        int cx=datac.size();
       
        for(int k=0;k<=cx+1;k++)
        {
        System.out.println("dhdeidhei");
        String msg=driver.findElements(By.xpath("//div[@class='calendar']/div[@class='month']/table/thead/tr/th[@class='caption']")).get(k).getText();
       
        System.out.println(msg);
        //selecting month
        if(datac.get(k).getText().equals(month_year))
        {System.out.println("-----------------------------------------------");
        List<WebElement> days = driver.findElements(By.xpath("//div[@class='calendar']/div[@class='month']["+(i+1)+"]/table/tbody/tr/td/div"));
       
        for(WebElement d:days)
        {
        System.out.println(d.getText());
        if(d.getText().equals(Day_Date))
        {
        d.click();
        }
        }
        }
       
       
        }
        }
       
       
       
}
//convert name of month into number of month
public int ObtenerNumeroMes(String NombreMes){

      int NumeroMes;  

      switch(NombreMes) {

       case ("January") :
           NumeroMes = 1;
           return NumeroMes;

       case ("February") :
           NumeroMes = 2;
           return NumeroMes;

       case ("March") :
           NumeroMes = 3;
           return NumeroMes;

       case ("April") :
           NumeroMes = 4;
           return NumeroMes;

       case ("May") :
           NumeroMes = 5;
           return NumeroMes;

       case ("June") :
           NumeroMes = 6;
           return NumeroMes;

       case ("July") :
           NumeroMes = 7;
           return NumeroMes;

       case ("August") :
           NumeroMes = 8;
           return NumeroMes;

       case ("September") :
           NumeroMes = 9;
           return NumeroMes;

       case ("October") :
           NumeroMes = 10;
           return NumeroMes;

       case ("November") :
           NumeroMes = 11;
           return NumeroMes;

       case ("December") :
           NumeroMes = 11;
           return NumeroMes;

           default:
           System.out.println("Error");
           return 0;

       }
}
}


Screenshot: