What is wrong with this code??

Exception in thread "main" java.lang.Error: Unresolved compilation problems:

The method getDayOfWeek() is undefined for the type Date

The method advanceTo(Date) is undefined for the type Date

at DateClient.main(DateClient.java:22)

import java.util.*;

public class DateClient {

public static void main(String[] args) {

Scanner userInput = new Scanner(System.in);

System.out.println("What is today's date(month day year)? ");

int month = userInput.nextInt();

int day = userInput.nextInt();

int year = userInput.nextInt();

Date TodayDate = new Date(year, month, day);

System.out.print("What is your birthday(month, day, year)?");

month = userInput.nextInt();

day = userInput.nextInt();

year = userInput.nextInt();

Date bDate = new Date(year,month,day);

System.out.print("You were born on " + bDate+","+" which was a "+bDate.getDayOfWeek());

if(bDate.isLeapYear()){

System.out.println(" "+year+" was a leap year.");

}

System.out.println("You are "+bDate.advanceTo(TodayDate)+" days old.");

}

}