java.time.ZonedDateTime.until() 方法示例

package com.codingdict;

import java.time.ZonedDateTime;
import java.time.temporal.ChronoUnit;

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

      ZonedDateTime date = ZonedDateTime.parse("2017-03-28T12:25:38.492+05:30[Asia/Calcutta]");
      ZonedDateTime date1 = ZonedDateTime.now();
      System.out.println(date.until(date1, ChronoUnit.HOURS));  
   }
}