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Java ChronoLocalDateTime toEpochSecond()用法及代碼示例


ChronoLocalDateTime類的toEpochSecond()方法用於將此ChronoLocalDateTime轉換為自1970-01-01T00:00:00Z以來的秒數。該方法將此ChronoLocalDateTime與作為參數傳遞的偏移量相結合,以計算epoch-second值,該值是從1970-01-01T00:00:00Z開始經過的秒數。時期之後的時間軸上的瞬間為正,早期為負。

用法:

default long toEpochSecond(ZoneOffset offset)

參數:此方法接受參數offset,即區域偏移。


返回值:此方法返回long,它是自1970-01-01T00:00:00Z的紀元以來的秒數,可能為負數。

以下示例程序旨在說明toEpochSecond()方法:

示例1:

// Java program to demonstrate 
// ChronoLocalDateTime.toEpochSecond() method 
  
import java.time.*; 
import java.time.chrono.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create ChronoLocalDateTime object 
        ChronoLocalDateTime time 
            = LocalDateTime 
                  .parse("2019-12-31T19:15:30"); 
  
        // print ChronoLocalDateTime 
        System.out.println("ChronoLocalDateTime: "
                           + time); 
  
        // create ZoneId 
        ZoneOffset zone = ZoneOffset.of("Z"); 
  
        // print ZoneId 
        System.out.println("Passed ZoneOffset: "
                           + zone); 
  
        // print result 
        System.out.println("Epoch Second: "
                           + time.toEpochSecond(zone)); 
    } 
}
輸出:
ChronoLocalDateTime: 2019-12-31T19:15:30
Passed ZoneOffset: Z
Epoch Second: 1577819730

示例2:

// Java program to demonstrate 
// ChronoLocalDateTime.toEpochSecond() method 
  
import java.time.*; 
import java.time.chrono.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create ChronoLocalDateTime object 
        ChronoLocalDateTime time 
            = LocalDateTime.parse( 
                "2018-10-25T23:12:31.123"); 
  
        // print ChronoLocalDateTime 
        System.out.println("ChronoLocalDateTime: "
                           + time); 
  
        // create ZoneId 
        ZoneOffset zone = ZoneOffset.of("Z"); 
  
        // print ZoneId 
        System.out.println("Passed ZoneOffset: "
                           + zone); 
  
        // print result 
        System.out.println("Epoch Second: "
                           + time.toEpochSecond(zone)); 
    } 
}
輸出:
ChronoLocalDateTime: 2018-10-25T23:12:31.123
Passed ZoneOffset: Z
Epoch Second: 1540509151

參考: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoLocalDateTime.html#toEpochSecond-java.time.ZoneOffset-



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注:本文由純淨天空篩選整理自srinam大神的英文原創作品 ChronoLocalDateTime toEpochSecond() 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。