Java GregorianCalendar getMinimum()方法

java.util.GregorianCalendar.getMinimum() 方法是Java中的一个内置函数，用于返回作为参数传递给该函数的特定日历域的最小值。对于任何可能的时间值，它是get()方法返回的最小值，同时考虑到getFirstDayOfWeek()、getMinimalDaysInFirstWeek()、getGregorianChange()和getTimeZone()方法的当前值。

语法

public int getMinimum(int calendarfield)

参数： 该函数接受一个整数类型的强制性参数calendarfield，该函数将返回该GregorianCalender实例的最小值。

返回值：

本方法返回该GregorianCalender实例的指定日历字段的最小值。

例子。

Input : DAY_OF_MONTH
Output : 1

Input : WEEK_OF_MONTH
Output : 0

以下程序说明了java.util.GregorianCalendar.getMinimum()函数的使用。

程序1:

// Java Program to illustrate getMinimum() function 
// GregorianCalender
  
import java.io.*;
import java.util.*;
  
class GFG {
     public static void main(String[] args) {
      
      // Create a new calendar
      GregorianCalendar cal = (GregorianCalendar) 
                        GregorianCalendar.getInstance();
  
      // Display the current date and time
      System.out.println("Current Date and Time : "
                                    + cal.getTime());
  
      // Display minimum for WEEK_OF_MONTH
      int minm = cal.getMinimum(GregorianCalendar.WEEK_OF_MONTH);
      System.out.println("Minimum for WEEK_OF_MONTH field :"
                                                   + minm);
  
      // Display minimum for DAY_OF_MONTH
      minm = cal.getMinimum(GregorianCalendar.DAY_OF_MONTH);
      System.out.println("Minimum for DAY_OF_MONTH field:"
                                                  + minm);
   }
}

输出。

Current Date and Time : Fri Jul 27 11:40:24 UTC 2018
Minimum for WEEK_OF_MONTH field :0
Minimum for DAY_OF_MONTH field:1

程序2

// Java Program to illustrate getMinimum() function 
// GregorianCalender
  
import java.io.*;
import java.util.*;
  
class GFG {
     public static void main(String[] args) {
      
      // Create a new calendar
      GregorianCalendar cal = (GregorianCalendar) 
                        GregorianCalendar.getInstance();
  
      // Display the current date and time
      System.out.println("Current Date and Time : "
                                         + cal.getTime());
  
      // Display minimum for YEAR
      int minm = cal.getMinimum(GregorianCalendar.YEAR);
      System.out.println("Minimum for YEAR field :"
                                          + minm);
  
      // Display minimum for HOUR_OF_DAY
      minm = cal.getMinimum(GregorianCalendar.HOUR_OF_DAY);
      System.out.println("Minimum for HOUR_OF_DAY field :"
                                                  + minm);
   }
}

输出。

Current Date and Time : Fri Jul 27 11:40:28 UTC 2018
Minimum for YEAR field :1
Minimum for HOUR_OF_DAY field :0

**参考资料: ** https://docs.oracle.com/javase/7/docs/api/java/util/GregorianCalendar.html#getMinimum()