The Java Developers Almanac 1.4

e376. Comparing Dates

    Calendar xmas = new GregorianCalendar(1998, Calendar.DECEMBER, 25);
    
    Calendar newyears = new GregorianCalendar(1999, Calendar.JANUARY, 1);
    
    // Determine which is earlier
    boolean b = xmas.after(newyears);            // false
    b = xmas.before(newyears);                   // true
    
    
    // Get difference in milliseconds
    long diffMillis = newyears.getTimeInMillis()-xmas.getTimeInMillis();
    
    // Get difference in seconds
    long diffSecs = diffMillis/(1000);           // 604800
    
    // Get difference in minutes
    long diffMins = diffMillis/(60*1000);        // 10080
    
    // Get difference in hours
    long diffHours = diffMillis/(60*60*1000);    // 168
    
    // Get difference in days
    long diffDays = diffMillis/(24*60*60*1000);  // 7

Related Examples

e373. Getting the Current Date
e374. Creating a Date Object for a Particular Date
e375. Determining the Number of Days in a Month
e377. Determining a Person's Age
e378. Determining If a Year Is a Leap Year
e379. Determining the Day-of-Week for a Particular Date

See also: Arrays    Bits    Collections    Hash Tables    Lists    Property Files    Sets    Sorted Collections    Time    Timers

© 2002 Addison-Wesley.