Java 8 的 Date 及 Time 的處理

方便機器處理的日期時間類別 java.time.Instant; java.time.Duration.

方便人類閱讀的日期時間類別: java.time.LocalDate, java.time.LocalTime, java.time.LocalDateTime; java.time.Period

	/*
	* To change this license header, choose License Headers in Project Properties.
	* To change this template file, choose Tools | Templates
	* and open the template in the editor.
	*/
	package javaplayground;
	import java.time.Duration;
	import java.time.Instant;
	import java.time.LocalDate;
	import java.time.LocalDateTime;
	import java.time.Period;
	/**
	*
	* @author user
	*/
	public class JavaPlayground {
	/**
	* @param args the command line arguments
	*/
	public static void main(String[] args) {
	// Time for machine to read
	Instant t = Instant.ofEpochSecond(3);
	System.out.println("Unix epoch time passing 3 seconds: " + t);
	Instant now = Instant.now();
	System.out.println("Now:" + now);
	// Duration is the time for machine to read
	// Store the number of seconds or nanosecond from the unix epoch (1770-01-01T00:00:00)
	LocalDateTime d1 = LocalDateTime.of(2017, 9, 17, 0, 0);
	LocalDateTime d2 = LocalDateTime.of(2017, 9, 20, 0, 0);
	System.out.println("Duration: " + Duration.between(d1, d2).getSeconds() + "Seconds");
	// Period is the time for human to read
	// Handle amount of time in terms of years, months, and days
	LocalDate d3 = LocalDate.of(2017, 9, 17);
	LocalDate d4 = LocalDate.of(2018, 9, 20);
	System.out.println("Period:" + Period.between(d3, d4));
	}
	}

view raw java8DateTime.java hosted with ❤ by GitHub