Java Calendar internalGet()用法及代碼示例

Calendar類中的internalGet(int calndr_field)方法用於返回給定日曆字段的值作為參數。
注意：該操作不涉及任何規範化或驗證。

用法:

protected final int internalGet(int calndr_field)

參數：該方法采用一個參數calndr_field，該參數表示要操作的日曆字段。

返回值：該方法返回傳遞的參數的值。

以下示例程序旨在說明Calendar類的internalGet()方法的用法：
示例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)); 
    } 
}

輸出：

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

示例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)); 
    } 
}

輸出：

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

參考： https://docs.oracle.com/javase/8/docs/api/java/util/Calendar.html#internalGet-int-

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注：本文由純淨天空篩選整理自Chinmoy Lenka大神的英文原創作品 Calendar internalGet() Method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。