Java 中的 Calendar internalGet()方法，带示例

原文:https://www . geesforgeks . org/calendar-internal get-method-in-Java-with-examples/

Calendar 类中的internal get(intcalndr _ field)方法用于返回给定日历字段的值作为参数。 注:操作不涉及任何归一化或验证。

语法:

protected final int internalGet(int *calndr_field*)

参数:该方法取一个参数 calndr_field ，指的是要操作的日历字段。

返回值:该方法返回传递参数的值。

下面的程序说明了日历类的 internalGet()方法的工作: 例 1:

// Java code to illustrate
// internalGet() method

import java.util.*;

public class CalendarDemo
    extends GregorianCalendar {
    public static void main(String args[])
    {

        // Creating a new calendar
        CalendarDemo calndr = new CalendarDemo();

        // Displaying the Current date
        System.out.println("The current date is: "
                           + calndr.getTime());

        // Getting the Month
        System.out.println("Month is: "
                           + calndr
                                 .internalGet(MONTH));

        // Getting the Year
        System.out.println("Year is: "
                           + calndr
                                 .internalGet(YEAR));
    }
}

Output:

The current date is: Wed Feb 20 16:11:36 UTC 2019
Month is: 1
Year is: 2019

例 2:

// Java code to illustrate
// internalGet() method

import java.util.*;

public class Calendar_Demo
    extends GregorianCalendar {
    public static void main(String args[])
    {
        // Creating a calendar object
        Calendar_Demo calndr = new Calendar_Demo();

        // Displaying the current date
        System.out.println("Calendar: "
                           + calndr
                                 .getTime());

        // Displaying the year
        System.out.println("Year: "
                           + calndr
                                 .internalGet(YEAR));

        // Displaying the month
        System.out.println("Month: "
                           + calndr
                                 .internalGet(MONTH));

        // Displaying other credentials
        System.out.println("Day: "
                           + calndr
                                 .internalGet(DAY_OF_WEEK));
    }
}

Output:

Calendar: Thu Feb 21 09:43:53 UTC 2019
Year: 2019
Month: 1
Day: 5

参考:https://docs . Oracle . com/javase/8/docs/API/Java/util/calendar . html # internal get-int-

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