Java中的 Calendar getActualMaximum() 方法及示例

Calendar 类的getActualMaximum(int field_value )方法用于根据此 Calendar 的时间值返回指定日历字段可能具有的最大值。

句法：

public int getActualMaximum(int field_value)

参数：该方法接受一个整数类型的参数field_value ，指的是需要返回最大值的日历。

返回值：该方法返回传递的字段的最大值。

下面的程序说明了 Calendar 类的 getActualMaximum() 方法的工作原理：
示例 1：

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

输出：

The Maximum year: 292278994
The Maximum Month is: 11

示例 2：

// Java Code to illustrate
// getActualMaximum() 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 maximum value that
        // year field can have
        int yr
            = calndr.getActualMaximum(Calendar.YEAR);
        System.out.println("The Maximum year: "
                           + yr);
  
        // Getting the maximum value that
        // month field can have
        int mon
            = calndr.getActualMaximum(Calendar.MONTH);
        System.out.println("The Maximum Month is: "
                           + mon);
    }
}

输出：

The Maximum year: 292278993
The Maximum Month is: 11

参考： https: Java/util/Calendar.html#getActualMaximum(int)