Java Date query -- Please help...Really Stuck!!!

Question

My application gets a date from the database. I also create a new Date() to hold todays date. I need to be able to calculate the number of hours between the 2 if the days are the same or the no of days/hours if the days/month/year are different
Can anyone help me with some code that might help me do this
Thanks in advance

Answer 1

import java.util.Calendar;
import java.util.Date;
public final class DateUtils {
    private static void displayDifference( final Calendar c1, final Calendar c2, final int field, final String displayText ) {
        System.out.println( displayText + " " + Math.abs( c1.get( field ) - c2.get( field ) );
    public static final void dateDiff( final Date d1, final Date d2 ) {
        final Calendar c1 = Calendar.getInstance();
        final Calendar c2 = Calendar.getInstance();
        c1.setTime( d1 );
        c2.setTime( d2 );
        displayDifference( c1, c2, "Years: ", Calendar.YEAR );
        displayDifference( c1, c2, "Days: ", Calendar.DAY_OF_YEAR );
        displayDifference( c1, c2, "Hours: ", Calendar.HOUR );
        displayDifference( c1, c2, "Minutes: ", Calendar.MINUTE );
        displayDifference( c1, c2, "Seconds: ", Calendar.SECOND );
}