查询Datetime对象

import java.time.LocalDate;

import java.time.LocalTime;/** 来 自 时代Java公众号 - N o w J a  v a . c o m**/

import java.time.ZonedDateTime;

import java.time.temporal.TemporalQueries;

import java.time.temporal.TemporalQuery;

import java.time.temporal.TemporalUnit;


public class Main {

  public static void main(String[] args) {

    // Get references of the precision and local date queries

    TemporalQuery<TemporalUnit> precisionQuery = TemporalQueries.precision();

    TemporalQuery<LocalDate> localDateQuery = TemporalQueries.localDate();


    // Query a LocalDate

    LocalDate ld = LocalDate.now();

    TemporalUnit precision = ld.query(precisionQuery);

    LocalDate queryDate = ld.query(localDateQuery);

    System.out.println("Precision of LocalDate: " + precision);
    /**
    来 自 时代Java公众号 - nowjava.com
    **/

    System.out.println("LocalDate of LocalDate: " + queryDate);


    // Query a LocalTime

    LocalTime lt = LocalTime.now();

    precision = lt.query(precisionQuery);

    queryDate = lt.query(localDateQuery);

    System.out.println("Precision of LocalTime: " + precision);

    System.out.println("LocalDate of LocalTime: " + queryDate);


    // Query a ZonedDateTime