Examples of the Calendar class in java

Calendar class, it is an abstract class that encapsulates all calendar field values. The values ​​can be obtained through a unified method based on the different calendar fields passed in.

(Recommended tutorial: java introductory tutorial)

1. Get a calendar object

Calendar c = Calendar.getInstance()；//返回的是子类对象

2.Member method

public void add(int field,int amount):根据给定的日历字段和对应的时间，来对当前的日历进行操作。
public final void set(int year,int month,int date):设置当前日历的年月日

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Code implementation:

import java.util.Calendar;

/*
 * public void add(int field,int amount):根据给定的日历字段和对应的时间，来对当前的日历进行操作。
 * public final void set(int year,int month,int date):设置当前日历的年月日
 */
public class CalendarDemo {
    public static void main(String[] args) {
        // 获取当前的日历时间
        Calendar c = Calendar.getInstance();

        // 获取年
        int year = c.get(Calendar.YEAR);
        // 获取月
        int month = c.get(Calendar.MONTH);
        // 获取日
        int date = c.get(Calendar.DATE);
        System.out.println(year + "年" + (month + 1) + "月" + date + "日");

        // // 三年前的今天
        // c.add(Calendar.YEAR, -3);
        // // 获取年
        // year = c.get(Calendar.YEAR);
        // // 获取月
        // month = c.get(Calendar.MONTH);
        // // 获取日
        // date = c.get(Calendar.DATE);
        // System.out.println(year + "年" + (month + 1) + "月" + date + "日");

        // 5年后的10天前
        c.add(Calendar.YEAR, 5);
        c.add(Calendar.DATE, -10);
        // 获取年
        year = c.get(Calendar.YEAR);
        // 获取月
        month = c.get(Calendar.MONTH);
        // 获取日
        date = c.get(Calendar.DATE);
        System.out.println(year + "年" + (month + 1) + "月" + date + "日");
        System.out.println("--------------");

        c.set(2011, 11, 11);
        // 获取年
        year = c.get(Calendar.YEAR);
        // 获取月
        month = c.get(Calendar.MONTH);
        // 获取日
        date = c.get(Calendar.DATE);
        System.out.println(year + "年" + (month + 1) + "月" + date + "日");
    }
}

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