Java Calendar setTime()用法及代碼示例

Calendar類中的setTime(Date dt)方法用於設置此Calendar的時間值表示的Calendars時間，並以給定或通過的日期為參數。

用法:

public final void setTime(Date dt))

參數：該方法采用Date類型的一個參數dt表示要設置的給定日期。

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setTime()方法的用法：
示例1:

// Java code to illustrate 
// setTime() method 
  
import java.util.*; 
public class Calendar_Demo 
    extends GregorianCalendar { 
    public static void main(String[] args) 
    { 
        // Creating calendar objects 
        Calendar calndr1 
            = (Calendar)Calendar.getInstance(); 
        Calendar calndr2 
            = (Calendar)Calendar.getInstance(); 
  
        // Displaying the current date 
        System.out.println("The Current"
                           + " System Date: "
                           + calndr1.getTime()); 
  
        // Setting to a different date 
        calndr1.set(Calendar.MONTH, 5); 
        calndr1.set(Calendar.YEAR, 2006); 
        calndr1.set(Calendar.DAY_OF_WEEK, 15); 
        Date dt = calndr1.getTime(); 
  
        // Setting the timevalue 
        calndr2.setTime(dt); 
  
        // Displaying the new date 
        System.out.println("The modified"
                           + " Date:"
                           + calndr2.getTime()); 
    } 
}

輸出：

The Current System Date: Fri Feb 22 07:33:13 UTC 2019
The modified Date:Sun Jun 18 07:33:13 UTC 2006

示例2:

// Java code to illustrate 
// setTime() method 
  
import java.util.*; 
  
public class Calendar_Demo 
    extends GregorianCalendar { 
  
    public static void main(String[] args) 
    { 
        // Creating calendar objects 
        Calendar calndr1 
            = (Calendar)Calendar.getInstance(); 
        Calendar calndr2 
            = (Calendar)Calendar.getInstance(); 
  
        // Displaying the current date 
        System.out.println("The Current"
                           + " System Date: "
                           + calndr1.getTime()); 
  
        // Setting to a different date 
        calndr1.set(Calendar.MONTH, 10); 
        calndr1.set(Calendar.YEAR, 1995); 
        calndr1.set(Calendar.DAY_OF_WEEK, 20); 
        Date dt = calndr1.getTime(); 
  
        // Setting the timevalue 
        calndr2.setTime(dt); 
  
        // Displaying the new date 
        System.out.println("The modified"
                           + " Date: "
                           + calndr2.getTime()); 
    } 
}

輸出：

The Current System Date: Fri Feb 22 07:33:20 UTC 2019
The modified Date: Fri Nov 24 07:33:20 UTC 1995

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

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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 setTime() 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。