URGENT HELP WITH DATES

Question

Hi, I need to compare two dates, so I can get the difference betweem them in hours.

Answer 1

Try this.. This does it in days but I think you will get the idea..
import java.io.*;
import java.util.*;
import java.text.*;
public class Ex1805
     public static void main(String[] args)
          SimpleDateFormat sdf = new SimpleDateFormat("d/M/y");
          BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
          String inputDate;
          Date first = new Date(), second = new Date();
          final long MSInDay = 1000 * 60 * 60 * 24;
          boolean valid;
// input first date
          valid = false;
          while(!valid)
               try
               System.out.print("Enter first date: ");
               inputDate = br.readLine();
               first = sdf.parse(inputDate);
               valid = true;
               catch(ParseException e)
                    System.out.println("Invalid     date. Please enter again.");
               catch(IOException e)
                    System.out.println("IO Error");
// input second date
          valid = false;
          while(!valid)
               try
               System.out.print("Enter second date: ");
               inputDate = br.readLine();
               second = sdf.parse(inputDate);
               valid = true;
               catch(ParseException e)
                    System.out.println("Invalid     date. Please enter again.");
               catch(IOException e)
                    System.out.println("IO Error");
//     calculate difference in days
          long milliseconds = second.getTime() - first.getTime();
          double doubleDays = (double)milliseconds / MSInDay;
          int days = (int)(doubleDays + 0.5);
          System.out.println("Number of days: " + days);