Java Calendar complete()用法及代碼示例

Calendar類中的complete()方法用於填充日曆字段中所有未設置的字段。它遵循以下完成過程：

首先，如果尚未計算時間值，則調用computeTime()方法以從日曆字段值進行計算。
其次，要使用computeFields()方法計算所有日曆字段值。

用法:

protected void complete()

參數：該方法不帶任何參數。

返回值：該方法不返回任何值。

以下示例程序旨在說明Calendar類的complete()方法的用法：
示例1:

// Java Code to illustrate 
// complete() Method 
  
import java.util.*; 
  
public class CalendarClassDemo 
    extends GregorianCalendar { 
    public static void main(String args[]) 
    { 
        // Creating calendar object 
        CalendarClassDemo calndr = new CalendarClassDemo(); 
  
        // Displaying the current date 
        System.out.println("The Current "
                           + "date is: " + calndr.getTime()); 
  
        // Clearing the calendar 
        calndr.clear(); 
  
        // Set a new year and call 
        // complete() 
        calndr.set(GregorianCalendar.YEAR, 2008); 
        calndr.complete(); 
  
        // Displaying the current date 
        System.out.println("The new"
                           + " date is: " + calndr.getTime()); 
    } 
}

輸出：

The Current date is: Wed Feb 13 15:39:33 UTC 2019
The new date is: Tue Jan 01 00:00:00 UTC 2008

示例2:

// Java Code to illustrate 
// complete() Method 
  
import java.util.*; 
  
public class CalendarClassDemo 
    extends GregorianCalendar { 
    public static void main(String args[]) 
    { 
        // Creating calendar object 
        CalendarClassDemo calndr = new CalendarClassDemo(); 
  
        // Displaying the current date 
        System.out.println("The Current "
                           + "date is: " + calndr.getTime()); 
  
        // Clearing the calendar 
        calndr.clear(); 
  
        // Set a new year and call 
        // complete() 
        calndr.set(GregorianCalendar.YEAR, 1996); 
        calndr.complete(); 
  
        // Displaying the current date 
        System.out.println("The new"
                           + " date is: " + calndr.getTime()); 
    } 
}

輸出：

The Current date is: Wed Feb 13 15:39:36 UTC 2019
The new date is: Mon Jan 01 00:00:00 UTC 1996

參考： https://docs.oracle.com/javase/7/docs/api/java/util/Calendar.html#complete()

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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 complete() 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。