Java Calendar getTimeInMillis()用法及代碼示例

Calendar類中的getTimeInMillis()方法用於返回此日曆的當前時間(以毫秒為單位)。

用法:

public long getTimeInMillis()

參數：該方法不包含任何參數。

返回值：該方法以毫秒為單位返回此日曆的當前時間。

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

// Java code to illustrate 
// getTimeInMillis() method 
  
import java.util.*; 
  
public class Calendar_Demo { 
  
    public static void main(String args[]) 
        throws InterruptedException 
    { 
  
        // Creating a calendar 
        Calendar calndr1 = Calendar.getInstance(); 
  
        // Displaying the current time 
        System.out.println("The Current Time"
                           + " is: "
                           + calndr1.getTimeInMillis()); 
  
        // Adding few delay 
        Thread.sleep(10000); 
  
        // Creating another calendar 
        Calendar calndr2 = Calendar.getInstance(); 
  
        // Displaying the upcoming time 
        System.out.println("The Upcoming Time"
                           + " is: "
                           + calndr2.getTimeInMillis()); 
    } 
}

輸出：

The Current Time is: 1550725664034
The Upcoming Time is: 1550725674053

示例2:

// Java code to illustrate 
// getTimeInMillis() method 
  
import java.util.*; 
  
public class Calendar_Demo { 
  
    public static void main(String args[]) 
        throws InterruptedException 
    { 
  
        // Creating a calendar 
        Calendar calndr1 = Calendar.getInstance(); 
  
        // Displaying the current time 
        System.out.println("The Current Time"
                           + " is: "
                           + calndr1.getTimeInMillis()); 
  
        // Adding few delay 
        Thread.sleep(5000); 
  
        // Creating another calendar 
        Calendar calndr2 = Calendar.getInstance(); 
  
        // Displaying the upcoming time 
        System.out.println("The Upcoming Time"
                           + " is: "
                           + calndr2.getTimeInMillis()); 
    } 
}

輸出：

The Current Time is: 1550725683182
The Upcoming Time is: 1550725688208

參考： https://docs.oracle.com/javase/8/docs/api/java/util/Calendar.html#getTimeInMillis–

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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 getTimeInMillis() 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。