June 2001
Intermediate to advanced
888 pages
21h 1m
English
You have a date and need to find what day of the week, month, or year that date falls on.
Use the Calendar class’s get( )
method, which has constants for
retrieving most such values.
The Calendar class can return most of these:
// CalendarDemo.java
Calendar c = Calendar.getInstance( ); // today
System.out.println("Year: " + c.get(Calendar.YEAR));
System.out.println("Month: " + c.get(Calendar.MONTH));
System.out.println("Day: " + c.get(Calendar.DAY_OF_MONTH));
System.out.println("Day of week = " + c.get(Calendar.DAY_OF_WEEK));
System.out.println("Day of year = " + c.get(Calendar.DAY_OF_YEAR));
System.out.println("Week in Year: " + c.get(Calendar.WEEK_OF_YEAR));
System.out.println("Week in Month: " + c.get(Calendar.WEEK_OF_MONTH));
System.out.println("Day of Week in Month: " +
c.get(Calendar.DAY_OF_WEEK_IN_MONTH));
System.out.println("Hour: " + c.get(Calendar.HOUR));
System.out.println("AM or PM: " + c.get(Calendar.AM_PM));
System.out.println("Hour (24-hour clock): " +
c.get(Calendar.HOUR_OF_DAY));
System.out.println("Minute: " + c.get(Calendar.MINUTE));
System.out.println("Second: " + c.get(Calendar.SECOND));This chatty program shows most of the fields in the
Calendar class:
Year: 1999 Month: 6 Day: 19 Day of week = 2 Day of year = 200 Week in Year: 30 Week in Month: 4 Day of Week in Month: 3 Hour: 3 AM or PM: 1 Hour (24-hour clock): 15 Minute: 18 Second: 42