Java Reference
In-Depth Information
class TryCalendar {
public static void main(String[] args) {
FormattedInput in = new FormattedInput();
// Get the date of birth from the keyboard
int day = 0, month = 0, year = 0;
System.out.println("Enter your birth date as dd mm yyyy: ");
try {
day = in.readInt();
month = in.readInt();
year = in.readInt();
} catch(InvalidUserInputException e) {
System.out.println("Invalid input - terminating...");
System.exit(1);
}
// Create birth date calendar - month is 0 to 11
GregorianCalendar birthdate = new GregorianCalendar(year,
month-1,day);
GregorianCalendar today = new GregorianCalendar();
//
Today's date
// Create this year's birthday
GregorianCalendar birthday = new GregorianCalendar(
today.get(YEAR),
birthdate.get(MONTH),
birthdate.get(DATE));
int age = today.get(YEAR) - birthdate.get(YEAR);
String[] weekdays = new DateFormatSymbols().getWeekdays(); // Get
day names
System.out.println("You were born on a " +
weekdays[birthdate.get(DAY_OF_WEEK)]);
System.out.println("This year you " +
(birthday.after(today)
?"will be " : "are
") +
age + " years old.");
System.out.println("In " + today.get(YEAR) + " your birthday " +
(today.before(birthday)? "will be": "was") +
" on a "+ weekdays[birthday.get(DAY_OF_WEEK)]
+".");
}
}
TryCalendar.java
I got the following output:
Enter your birth date as dd mm yyyy:
05 12 1974
You were born on a Thursday
