Java Api--calendar Class

1. Calendar class overview

The Calendar class is an abstract class that is a specific moment with a set of such things as year, MONTH, Day_of_month, HOUR, etc.

Conversion between calendar fields provides methods and provides methods for manipulating calendar fields, such as getting the date of the next week.

2. Member Methods

public static Calendar getinstance (): Initialize, Return child class object

public int get (int field): Returns the value of the given calendar field

public void Add (int field,int amount): Operates on the current calendar based on the given calendar field and the corresponding time

Public final void Set (int year,int month,int date): Sets the month and day of the current calendar Example 1:

/** Calendar: It provides methods for converting between specific moments and a set of calendar fields such as year, MONTH, Day_of_month, HOUR, and provides methods for manipulating calendar fields, such as getting the date of the next week. * public int get (int field): Returns the value of the given Calendar field. Each calendar field in the Calendar class is a static member variable and is of type int. */ Public classCalendardemo { Public Static voidMain (string[] args) {//its calendar field has been initialized by the current date and time:Calendar RightNow = Calendar.getinstance ();//sub-class object//Get year        intYear =Rightnow.get (calendar.year); //Get Month        intmonth = Rightnow.get (calendar.month);//counting from 0 onwards//Get Day        intDate =Rightnow.get (calendar.date); System.out.println ( Year+ "Year" + (month + 1) + "Month" + Date + "Day"); }}

Example 2:

ImportJava.util.Calendar;/** public void Add (int field,int amount): Operates on the current calendar based on the given calendar field and the corresponding time. * Public final void set (int year,int month,int date): Sets the month and day of the current calendar*/ Public classCalendarDemo02 { Public Static voidMain (string[] args) {Calendar C= Calendar.getinstance ();//sub-class object//Get year        intYear =C.get (calendar.year); //Get Month        intmonth = C.get (calendar.month);//counting from 0 onwards//Get Day        intDate =C.get (calendar.date); System.out.println ( Year+ "Year" + (month + 1) + "Month" + Date + "Day"); //3 years ago today.C.add (calendar.year,-3); year=C.get (calendar.year); //Get Monthmonth =C.get (Calendar.month); //Get DayDate =C.get (calendar.date); System.out.println ( Year+ "Year" + (month + 1) + "Month" + Date + "Day"); //5 years later, 10 days agoC.add (calendar.year,5); C.add (Calendar.date,-10); year=C.get (calendar.year); //Get Monthmonth =C.get (Calendar.month); //Get DayDate =C.get (calendar.date); System.out.println ( Year+ "Year" + (month + 1) + "Month" + Date + "Day"); //Set the timeC.set (2011,11,11); year=C.get (calendar.year); //Get Monthmonth =C.get (Calendar.month); //Get DayDate =C.get (calendar.date); System.out.println ( Year+ "Year" + (month + 1) + "Month" + Date + "Day"); }}

Example 3: Get the February of any year and how many days

ImportJava.util.Calendar;ImportJava.util.Scanner;/** Get how many days in February of any year * * Analysis: * A: Keyboard input any year * B: Set Calendar Object Month Day * year is a input data * month is 2 * Day is 1 * C: Push the time forward one day, the last day of February * D: Get this day output can be*/ Public classCalendarDemo03 { Public Static voidMain (string[] args) {//Keyboard entry for any yearScanner sc =NewScanner (system.in); System.out.println ("Please enter the year:"); intYear =Sc.nextint (); //set Calendar object's Month dayCalendar C =calendar.getinstance (); C.set (Year,2, 1);//This is actually the March 1 of the year.//Push the time forward one day, the last day of FebruaryC.add (Calendar.date, 1); //get this day's outputSystem.out.println (C.get (calendar.date)); }}

Java Api--calendar Class