Java 中的 Instant getEpochSecond()方法，示例

原文:https://www . geeksforgeeks . org/instant-getepochsecond-method-in-Java-with-examples/

Instant 类的 getEpochSecond() 方法用于返回从 1970-01-01T00:00:00Z 的 Java 纪元开始的秒数。这意味着此实例的时间(以秒为单位)与“1970-01-01T00:00:00Z”所表示的时间之间的差异通过此方法返回。历元秒计数是简单的递增秒计数，其中秒 0 是 1970-01-01T00:00:00Z。

语法:

public long getEpochSecond()

返回:该方法返回 1970-01-01T00:00:00Z 的秒。

下面的程序说明了 Instant.getEpochSecond()方法:

程序 1:

// Java program to demonstrate
// Instant.getEpochSecond() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create  instance object
        Instant instant
            = Instant.parse("2018-10-20T16:55:30.00Z");

        // print Instant Value
        System.out.println("Instant: " + instant);

        // get epochValue using getEpochSecond
        long epochValue = instant.getEpochSecond();

        // print results
        System.out.println("Java epoch Value: "
                           + epochValue);
    }
}

输出:

Instant: 2018-10-20T16:55:30Z
Java epoch Value: 1540054530

程序二:

// Java program to demonstrate
// Instant.getEpochSecond() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create current instance object
        Instant instant
            = Instant.now();

        // print Instant Value
        System.out.println("Current Instant: "
                           + instant);

        // get epochValue using getEpochSecond
        long epochValue = instant.getEpochSecond();

        // print results
        System.out.println("Java epoch Value: "
                           + epochValue);
    }
}

输出:

Current Instant: 2018-11-22T08:26:19.502Z
Java epoch Value: 1542875179

参考:https://docs . Oracle . com/javase/10/docs/API/Java/time/instant . html # getEpochSecond()

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