示例方法的详解都包含在注释内，当我们运行程序时，可以得到以下输出：

Current Date=2014-04-28

Specific Date=2014-01-01

Current Date in IST=2014-04-29

365th day from base date= 1971-01-01

100th day of 2014=2014-04-10

2. java.time.LocalTime：LocalTime是一个不可变的类，它的实例代表一个符合人类可读格式的时间，默认格式是hh:mm:ss.zzz。像LocalDate一样，该类也提供了时区支持，同时也可以传入小时、分钟和秒等输入参数创建实例，我们来看一个简单的程序，演示该类的使用方法。

package com.journaldev.java8.time;

import java.time.LocalTime;

import java.time.ZoneId;

/**

* LocalTime Examples

* @author pankaj

*

*/

public class LocalTimeExample {

public static void main(String[] args) {

//Current Time

LocalTime time = LocalTime.now();

System.out.println("Current Time="+time);

//Creating LocalTime by providing input arguments

LocalTime specificTime = LocalTime.of(12,20,25,40);

System.out.println("Specific Time of Day="+specificTime);

//Try creating time by providing invalid inputs

//LocalTime invalidTime = LocalTime.of(25,20);

//Exception in thread "main" java.time.DateTimeException:

//Invalid value for HourOfDay (valid values 0 - 23): 25

//Current date in "Asia/Kolkata", you can get it from ZoneId javadoc

LocalTime timeKolkata = LocalTime.now(ZoneId.of("Asia/Kolkata"));

System.out.println("Current Time in IST="+timeKolkata);

//java.time.zone.ZoneRulesException: Unknown time-zone ID: IST

//LocalTime todayIST = LocalTime.now(ZoneId.of("IST"));

//Getting date from the base date i.e 01/01/1970

LocalTime specificSecondTime = LocalTime.ofSecondOfDay(10000);

System.out.println("10000th second time= "+specificSecondTime);

}

}

当运行以上程序时，可以看到如下输出。

Current Time=15:51:45.240

Specific Time of Day=12:20:25.000000040

Current Time in IST=04:21:45.276

10000th second time= 02:46:40

3. java.time.LocalDateTime：LocalDateTime是一个不可变的日期-时间对象，它表示一组日期-时间，默认格式是yyyy-MM-dd-HH-mm-ss.zzz。它提供了一个工厂方法，接收LocalDate和LocalTime输入参数，创建LocalDateTime实例。我们来看一个简单的例子。

package com.journaldev.java8.time;

import java.time.LocalDate;

import java.time.LocalDateTime;

import java.time.LocalTime;

import java.time.Month;

import java.time.ZoneId;

import java.time.ZoneOffset;

public class LocalDateTimeExample {

public static void main(String[] args) {

//Current Date

LocalDateTime today = LocalDateTime.now();

System.out.println("Current DateTime="+today);

//Current Date using LocalDate and LocalTime

today = LocalDateTime.of(LocalDate.now(), LocalTime.now());

System.out.println("Current DateTime="+today);

//Creating LocalDateTime by providing input arguments

LocalDateTime specificDate = LocalDateTime.of(2014, Month.JANUARY, 1, 10, 10, 30);

System.out.println("Specific Date="+specificDate);

//Try creating date by providing invalid inputs

//LocalDateTime feb29_2014 = LocalDateTime.of(2014, Month.FEBRUARY, 28, 25,1,1);

//Exception in thread "main" java.time.DateTimeException:

//Invalid value for HourOfDay (valid values 0 - 23): 25

//Current date in "Asia/Kolkata", you can get it from ZoneId javadoc

LocalDateTime todayKolkata = LocalDateTime.now(ZoneId.of("Asia/Kolkata"));

System.out.println("Current Date in IST="+todayKolkata);

//java.time.zone.ZoneRulesException: Unknown time-zone ID: IST

//LocalDateTime todayIST = LocalDateTime.now(ZoneId.of("IST"));

//Getting date from the base date i.e 01/01/1970

LocalDateTime dateFromBase = LocalDateTime.ofEpochSecond(10000, 0, ZoneOffset.UTC);

System.out.println("10000th second time from 01/01/1970= "+dateFromBase);

}

}

在所有这三个例子中，我们已经看到如果我们提供了无效的参数去创建日期/时间，那么系统会抛出java.time.DateTimeException，这是一种运行时异常，我们并不需要显式地捕获它。

同时我们也看到，能够通过传入ZoneId得到日期/时间数据，你可以从它的Javadoc中得到支持的Zoneid的列表，当运行以上类时，可以得到以下输出。

Current DateTime=2014-04-28T16:00:49.455

Current DateTime=2014-04-28T16:00:49.493

Specific Date=2014-01-01T10:10:30

Current Date in IST=2014-04-29T04:30:49.493

10000th second time from 01/01/1970= 1970-01-01T02:46:40

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