211 Calender常用方法
方法名 |
说明 |
public int get(int field) |
返回给定日历的值 |
public abstract void add9int field,int amount) |
根据日历的规则,将指定的时间量添加或减去给定的日历字段 |
public final void set(int year,int month,int date) |
设置当前的年月日 |
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(module)myCalender
(package)it02e211
(class)CalenderDemo
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package it02e211;
//public int get(int field) 返回给定日历的值
//public abstract void add9int field,int amount) 根据日历的规则,将指定的时间量添加或减去给定的日历字段
//public final void set(int year,int month,int date) 设置当前的年月日
import java.util.Calendar;
public class CalenderDemo {
public static void main(String[] args) {
Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month = c.get(Calendar.MONTH);
int date = c.get(Calendar.DATE);
System.out.println("1:"+year+"年"+month+"月"+date+"日");//OUTPUT:1:2021年8月22日
//output a August for line-11 should have added 1 but no
c.add(Calendar.YEAR,-3);
int year2 = c.get(Calendar.YEAR);
int month2 = c.get(Calendar.MONTH)+1;
int date2 = c.get(Calendar.DATE);
System.out.println("2:"+year2+"年"+month2+"月"+date2+"日");//OUTPUT:2:2018年9月22日
//output a AD2018 for line-16 reduce 3
c.add(Calendar.YEAR,3);
c.add(Calendar.DATE,-1);
int year3 = c.get(Calendar.YEAR);
int month3 = c.get(Calendar.MONTH)+1;
int date3 = c.get(Calendar.DATE);
System.out.println("3:"+year3+"年"+month3+"月"+date3+"日");//OUTPUT:3:2021年9月21日
//so add-method can add and reduce some time
c.set(1999,01,01);
System.out.println("4:"+c.get(Calendar.YEAR)+"年"+(c.get(Calendar.MONTH)+1)+"月"+c.get(Calendar.DATE)+"日");
//OUTPUT:4:1999年2月1日
//get-method gives you the former month, which start from 0.
//set-method set month as the month being outputed, which start from 1.
}
}