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? Java Java??? Java8?? ?? ??? ???? ??

Java8?? ?? ??? ???? ??

Jan 07, 2021 pm 06:06 PM
java8

Java ?? ???? ????? Java 8

Java8?? ?? ??? ???? ??

?? ?? ?? ????: java basic tutorial

1 ?? ???

methods getYears() , getMonths() ? getDays() ). 

import?java.time.LocalDate;import?java.time.Month;import?java.time.Period;public?class?Test?{

????public?static?void?main(String[]?args)?{
????????LocalDate?today?=?LocalDate.now();
????????System.out.println("Today?:?"?+?today);
????????LocalDate?birthDate?=?LocalDate.of(1993,?Month.OCTOBER,?19);
????????System.out.println("BirthDate?:?"?+?birthDate);

????????Period?p?=?Period.between(birthDate,?today);
????????System.out.printf("年齡?:?%d?年?%d?月?%d?日",?p.getYears(),?p.getMonths(),?p.getDays());
????}}
Today?:?2017-06-16BirthDate?:?1993-10-19年齡?:?23?年?7?月?28?日

2 Duration class

?? ?(?: ?, ???)? ???? ??? ?????. 

import?java.time.Duration;import?java.time.Instant;public?class?Test?{

????public?static?void?main(String[]?args)?{
????????Instant?inst1?=?Instant.now();
????????System.out.println("Inst1?:?"?+?inst1);
????????Instant?inst2?=?inst1.plus(Duration.ofSeconds(10));
????????System.out.println("Inst2?:?"?+?inst2);

????????System.out.println("Difference?in?milliseconds?:?"?+?Duration.between(inst1,?inst2).toMillis());

????????System.out.println("Difference?in?seconds?:?"?+?Duration.between(inst1,?inst2).getSeconds());

????}}
Inst1?:?2017-06-16T07:46:45.085Z
Inst2?:?2017-06-16T07:46:55.085Z
Difference?in?milliseconds?:?10000Difference?in?seconds?:?10

3 ChronoUnit ???

ChronoUnit ???? ? ?? ?? ?? ?? ?? ??? ??? ???? ? ??? ? ????.
??? between() ???? ???? ? ??? ??? ??? ????.

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