Java8 ChronoUnits枚舉

java.time.temporal.ChronoUnit 枚舉在 Java8 中添加，以取代舊的API用來代表日，月等整數值

讓我們來看看他們的操作。

使用所選擇的任何編輯器創建下面的java程序在 C:/> JAVA

Java8Tester.java

import java.time.LocalDate; import java.time.temporal.ChronoUnit; public class Java8Tester { public static void main(String args[]){ Java8Tester java8tester = new Java8Tester(); java8tester.testChromoUnits(); } public void testChromoUnits(){ //Get the current date LocalDate today = LocalDate.now(); System.out.println("Current date: " + today); //add 1 week to the current date LocalDate nextWeek = today.plus(1, ChronoUnit.WEEKS); System.out.println("Next week: " + nextWeek); //add 1 month to the current date LocalDate nextMonth = today.plus(1, ChronoUnit.MONTHS); System.out.println("Next month: " + nextMonth); //add 1 year to the current date LocalDate nextYear = today.plus(1, ChronoUnit.YEARS); System.out.println("Next year: " + nextYear); //add 10 years to the current date LocalDate nextDecade = today.plus(1, ChronoUnit.DECADES); System.out.println("Date after ten year: " + nextDecade); } }

驗證結果

使用javac編譯器編譯如下類

C:\JAVA>javac Java8Tester.java

現在運行Java8Tester看到的結果

C:\JAVA>java Java8Tester

看到結果

Current date: 2014-12-10
Next week: 2014-12-17
Next month: 2015-01-10
Next year: 2015-12-10
Date after ten year: 2024-12-10