Java Calendar complete()用法及代码示例

Calendar类中的complete()方法用于填充日历字段中所有未设置的字段。它遵循以下完成过程：

首先，如果尚未计算时间值，则调用computeTime()方法以从日历字段值进行计算。
其次，要使用computeFields()方法计算所有日历字段值。

用法:

protected void complete()

参数：该方法不带任何参数。

返回值：该方法不返回任何值。

以下示例程序旨在说明Calendar类的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()); 
    } 
}

输出：

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()); 
    } 
}

输出：

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

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

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注：本文由纯净天空筛选整理自Chinmoy Lenka大神的英文原创作品 Calendar complete() Method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。