Java ChronoLocalDateTime toInstant()用法及代碼示例

ChronoLocalDateTime類的toInstant()方法用於將此ChronoLocalDateTime轉換為Instant。該方法將此ChronoLocalDateTime與作為參數傳遞的偏移量結合起來以計算Instant。

用法:

default Instant toInstant(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Instant，這是此ChronoLocalDateTime的Instant。

以下示例程序旨在說明toInstant()方法：

示例1:

// Java program to demonstrate 
// ChronoLocalDateTime.toInstant() 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("Instant: "
                           + time.toInstant(zone)); 
    } 
}

輸出：

ChronoLocalDateTime: 2019-12-31T19:15:30
Passed ZoneOffset: Z
Instant: 2019-12-31T19:15:30Z

示例2:

// Java program to demonstrate 
// ChronoLocalDateTime.toInstant() 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("Instant: "
                           + time.toInstant(zone)); 
    } 
}

輸出：

ChronoLocalDateTime: 2018-10-25T23:12:31.123
Passed ZoneOffset: Z
Instant: 2018-10-25T23:12:31.123Z

參考： https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoLocalDateTime.html#toInstant-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 toInstant() 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。