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