Java 日历 getActualMinimum()方法及示例

Calendar类的 getActualMinimum(int field_value) 方法用于返回指定的日历字段可能具有的最小值，该值基于该日历的时间值。

语法

public int getActualMinimum(int field_value)

参数： 该方法需要一个整数类型的参数 field_value ，指的是需要返回其最小值的日历。

返回值： 该方法返回所传递字段的最小值。

下面的程序说明了日历类的getActualMinimum()方法的工作原理：

示例1 :

// Java Code to illustrate
// getActualMinimum() Method
  
import java.util.*;
  
public class CalendarClassDemo {
    public static void main(String args[])
    {
        // Creating a calendar
        Calendar calndr = Calendar.getInstance();
  
        // Getting the Minimum value that
        // year field can have
        int yr
            = calndr.getActualMinimum(Calendar.YEAR);
        System.out.println("The Minimum year: "
                           + yr);
  
        // Getting the Minimum value that
        // month field can have
        int mon
            = calndr.getActualMinimum(Calendar.MONTH);
        System.out.println("The Minimum Month is: "
                           + mon);
    }
}

输出:

The Minimum year: 1
The Minimum Month is: 0

例2 :

// Java Code to illustrate
// getActualMinimum() Method
  
import java.util.*;
  
public class CalendarClassDemo {
    public static void main(String args[])
    {
        // Creating a calendar object
        Calendar calndr
            = new GregorianCalendar(2018, 9, 2);
  
        // Getting the Minimum value that
        // year field can have
        int yr
            = calndr.getActualMinimum(Calendar.YEAR);
        System.out.println("The Minimum year: "
                           + yr);
  
        // Getting the Minimum value that
        // month field can have
        int mon
            = calndr.getActualMinimum(Calendar.MONTH);
        System.out.println("The Minimum Month is: "
                           + mon);
    }
}

输出:

The Minimum year: 1
The Minimum Month is: 0

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