Java 中的 Calendar.get()方法
原文:https://www.geeksforgeeks.org/calendar-get-method-in-java/
java.util.Calendar.get()方法是 java.util.Calendar 类的一个方法。Calendar 类提供了一些在包外实现具体日历系统的方法。日历字段的一些示例有:年、日、月、周、年、年、分、秒、小时、上午、下午、月、月、月、日。
语法:
public int get(int field)
where, field represents the given calendar
field and the function returns the value of
given field.
异常:如果指定字段超出范围，则抛出arrayindextofboundsexception。
应用程序: 示例 1: 获取日期、月份、年份
// Java code to implement calendar.get() function
import java.util.*;
class GFG {
// Driver code
public static void main(String[] args) {
// creating a calendar
Calendar c = Calendar.getInstance();
// get the value of DATE field
System.out.println("Day : " +
c.get(Calendar.DATE));
// get the value of MONTH field
System.out.println("Month : " +
c.get(Calendar.MONTH));
// get the value of YEAR field
System.out.println("Year : " +
c.get(Calendar.YEAR));
}
}
输出:
Day : 1
Month : 2
Year : 2018
示例 2 : 获取一周中的某一天、一年中的某一天、一月中的某一周、一年中的某一周。
// Java Code of calendar.get() function
import java.util.*;
class GFG {
// Driver code
public static void main(String[] args) {
// creating a calendar
Calendar c = Calendar.getInstance();
// get the value of DATE_OF_WEEK field
System.out.println("Day of week : " +
c.get(Calendar.DAY_OF_WEEK));
// get the value of DAY_OF_YEAR field
System.out.println("Day of year : " +
c.get(Calendar.DAY_OF_YEAR));
// get the value of WEEK_OF_MONTH field
System.out.println("Week in Month : " +
c.get(Calendar.WEEK_OF_MONTH));
// get the value of WEEK_OF_YEAR field
System.out.println("Week in Year : " +
c.get(Calendar.WEEK_OF_YEAR));
// get the value of DAY_OF_WEEK_IN_MONTH field
System.out.println("Day of Week in Month : " +
c.get(Calendar.DAY_OF_WEEK_IN_MONTH));
}
}
输出:
Day of week : 5
Day of year : 60
Week in Month : 1
Week in Year : 9
Day of Week in Month : 1
示例 3 : 获取小时、分钟、秒和 AM_PM。
// Implementation of calendar.get()
// function in Java
import java.util.*;
class GFG {
// Driver code
public static void main(String[] args)
{
// creating a calendar
Calendar c = Calendar.getInstance();
// get the value of HOUR field
System.out.println("Hour : " + c.get(Calendar.HOUR));
// get the value of MINUTE field
System.out.println("Minute : " + c.get(Calendar.MINUTE));
// get the value of SECOND field
System.out.println("Second : " + c.get(Calendar.SECOND));
// get the value of AM_PM field
System.out.println("AM or PM : " + c.get(Calendar.AM_PM));
// get the value of HOUR_OF_DAY field
System.out.println("Hour (24-hour clock) : " + c.get(Calendar.HOUR_OF_DAY));
}
}
输出:
Hour : 6
Minute : 51
Second : 53
AM or PM : 0
Hour (24-hour clock) : 6
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