Java8本地Date Time API

LocalDate/本地時間和LocalDateTime類簡化時區不需要開發。

讓我們來看看他們操作。

選擇使用任何編輯器創建以下java程序在 C:/> JAVA

Java8Tester.java

import java.time.LocalDate;
import java.time.LocalTime;
import java.time.LocalDateTime;
import java.time.Month;

public class Java8Tester {
   public static void main(String args[]){
      Java8Tester java8tester = new Java8Tester();
      java8tester.testLocalDateTime(); 
   }

   public void testLocalDateTime(){
      // Get the current date and time
      LocalDateTime currentTime = LocalDateTime.now();     
      System.out.println("Current DateTime: " + currentTime);

      LocalDate date1 = currentTime.toLocalDate();
      System.out.println("date1: " + date1);
      Month month = currentTime.getMonth();
      int day = currentTime.getDayOfMonth();
      int seconds = currentTime.getSecond();
      System.out.println("Month: " + month
         +"day: " + day
         +"seconds: " + seconds
      );

      LocalDateTime date2 = currentTime.withDayOfMonth(10).withYear(2012);
      System.out.println("date2: " + date2);

      //12 december 2014
      LocalDate date3 = LocalDate.of(2014, Month.DECEMBER, 12); 
      System.out.println("date3: " + date3);

      //22 hour 15 minutes
      LocalTime date4 = LocalTime.of(22, 15); 
      System.out.println("date4: " + date4);

      //parse a string
      LocalTime date5 = LocalTime.parse("20:15:30"); 
      System.out.println("date5: " + date5);
   }	
}

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 DateTime: 2014-12-09T11:00:45.457                                
date1: 2014-12-09                                                        
Month: DECEMBERday: 9seconds: 45                                         
date2: 2012-12-10T11:00:45.457                                           
date3: 2014-12-12                                                        
date4: 22:15                                                             
date5: 20:15:30