Java API Time - OCA JSE 8 Ejemplos

package com.codemonkey; import static java.lang.System.out; import static java.lang.System.err; import java.time.LocalDateTime; import java.time.LocalTime; import java.time.Month; import java.time.OffsetDateTime; import java.time.Duration; import java.time.LocalDate; import java.time.Period; import java.time.ZonedDateTime; import java.time.format.DateTimeFormatter; import java.time.temporal.UnsupportedTemporalTypeException; import java.util.ArrayList; public class Main{ static public void main(String $[]){ getTimeAPIDemo(); } static void getTimeAPIDemo(){ LocalDate localDate = LocalDate.now(); out.println(localDate);//2018-05-07 Period period = Period.parse("P2Y"); out.println(period.getMonths());//0 try{ out.println(LocalDateTime.now().format(java.time.format.DateTimeFormatter.ISO_DATE)); out.println(LocalDateTime.now().format(java.time.format.DateTimeFormatter.ISO_DATE_TIME)); out.println(LocalDateTime.now().format(java.time.format.DateTimeFormatter.ISO_INSTANT)); out.println(LocalDateTime.now().format(java.time.format.DateTimeFormatter.ISO_LOCAL_DATE)); out.println(LocalDateTime.now().format(java.time.format.DateTimeFormatter.ISO_LOCAL_DATE_TIME)); out.println(LocalDateTime.now().format(java.time.format.DateTimeFormatter.ISO_OFFSET_DATE)); out.println(LocalDateTime.now().format(java.time.format.DateTimeFormatter.ISO_OFFSET_DATE_TIME)); out.println(LocalDateTime.now().format(java.time.format.DateTimeFormatter.ISO_OFFSET_TIME)); out.println(LocalDateTime.now().format(java.time.format.DateTimeFormatter.ISO_ORDINAL_DATE)); out.println(LocalDateTime.now().format(java.time.format.DateTimeFormatter.ISO_TIME)); out.println(LocalDateTime.now().format(java.time.format.DateTimeFormatter.ISO_WEEK_DATE)); out.println(LocalDateTime.now().format(java.time.format.DateTimeFormatter.ISO_ZONED_DATE_TIME)); out.println(LocalDateTime.now().format(java.time.format.DateTimeFormatter.BASIC_ISO_DATE)); }catch(UnsupportedTemporalTypeException ute){ err.println("Excepcion: campo no soportado"); ute.printStackTrace(); } localDate = LocalDate.of(1940, Month.JANUARY, 3); out.println(localDate);//1940-01-03 localDate = localDate.minusYears(3).plusMonths(10).plusDays(5); out.println(localDate);//1937-11-08 localDate.minusYears(10);//aqui no pasa nada out.println(localDate);//1937-11-08 out.println(localDate.getMonth() +" - "+localDate.getYear());//NOVEMBER - 1937 String date1 = "2011-12-03"; DateTimeFormatter formatter1 = DateTimeFormatter.ofPattern("yyyy-MM-dd"); localDate = LocalDate.parse(date1, formatter1); out.println(localDate.toString());//2011-12-03 //String date2 = "2014-12-03 00:00:00";//Esto no es correcto String date2 = "2014-12-03T00:00:00";//Esto es correcto DateTimeFormatter formatter2 = DateTimeFormatter.ISO_LOCAL_DATE_TIME; localDate = LocalDate.parse(date2, formatter2); out.println(localDate.toString());//2014-12-03 localDate = LocalDate.of(2019, Month.APRIL, 30); out.println(localDate.toString());//2019-04-30 period = Period.parse("P2Y8M"); out.println(period.getYears());//2 out.println(period.getMonths());//8 out.println(period.getDays());//0 out.println(period.toTotalMonths());//32 Duration duration = Duration.ofSeconds(355); out.println(duration.getSeconds());//355 duration = Duration.ofNanos(90909090); out.println(duration.getNano());//90909090 out.println(duration.getSeconds());//0 LocalDateTime localDateTime = LocalDateTime.now().withYear(2019); out.println(localDateTime);//2019-05-07T15:36:36.340 localDateTime = LocalDateTime.now().withMonth(11); out.println(localDateTime);//2018-11-07T15:37:26.823 localDateTime = LocalDateTime.now().withHour(10); out.println(localDateTime);//2018-05-07T10:38:05.398 localDateTime = LocalDateTime.now().withMinute(45); out.println(localDateTime);//2018-05-07T15:45:45.689 localDateTime = LocalDateTime.now().withSecond(32); out.println(localDateTime);//2018-05-07T15:40:32.238 period = Period.of(3,0,1);//of(año, mes, dia) out.println(period.toString());//P3Y1D period = Period.of(0,2,1); out.println(period.toString());//P2M1D period = Period.of(3,2,0); out.println(period.toString());//P3Y2M //Esto no se puede: //period = Period.of(0,Month.DECEMBER,0); period = Period.of(0,12,0); out.println(period.toString());//P12M period = Period.of(2017, 3, 1); period = period.plusDays(1); out.println(period.toString());//P2017Y3M2D period = Period.of(2015, 3, 1); period = period.plusYears(5); out.println(period.toString());//P2020Y3M1D period = Period.of(2018, 3, 1); period = period.plusMonths(3); out.println(period.toString());//P2018Y6M1D period = Period.of(2018, 3, 1); period = period.minusYears(3); out.println(period.toString());//P2015Y3M1D period = Period.of(2018, 3, 1); period = period.minusMonths(2); out.println(period.toString());//P2018Y1M1D period = Period.of(2018, 3, 1); period = period.minusDays(1); out.println(period.toString());//P2018Y3M LocalTime localTime = LocalTime.MAX; out.println(localTime.toSecondOfDay());//86399 LocalTime localTimeTemp = LocalTime.MIDNIGHT; localDateTime = localTimeTemp.atDate(LocalDate.now()); out.println(localDateTime);//2018-05-07T00:00 period = Period.of(3,4,7); int anyos = period.getYears(); int meses = period.getMonths(); int dias = period.getDays(); out.print(anyos+" años, "+meses+" meses,"+dias+" dias\n"); localDate = LocalDate.now(); out.println(localDate .format(DateTimeFormatter.ISO_WEEK_DATE));//2018-W19-1 OffsetDateTime odt = OffsetDateTime.now(); out.println(odt);//2018-05-07T16:54:53.905-05:00 out.println(odt .format(DateTimeFormatter.ISO_DATE));//2018-05-07-05:00 out.println(odt .format(DateTimeFormatter.ISO_OFFSET_DATE));//2018-05-07-05:00 out.println(odt .format(DateTimeFormatter.ISO_OFFSET_DATE_TIME));//2018-05-07T16:56:43.751-05:00 out.println("----------------------------------------------"); ZonedDateTime zdt = ZonedDateTime.now(); out.println(zdt);//2018-05-07T16:58:19.733-05:00[America/Mexico_City] out.println(zdt .format(DateTimeFormatter.ISO_DATE));//2018-05-07-05:00 out.println(zdt .format(DateTimeFormatter.ISO_OFFSET_DATE));//2018-05-07-05:00 out.println(zdt .format(DateTimeFormatter.ISO_OFFSET_DATE_TIME));//2018-05-07T16:58:19.733-05:00 out.println(zdt .format(DateTimeFormatter.ISO_ZONED_DATE_TIME));//2018-05-07T17:00:01.615-05:00[America/Mexico_City] out.println("**************Lista*************"); ArrayList<DateTimeFormatter> ldtFormatterList = new ArrayList<>(); ldtFormatterList.add(0, DateTimeFormatter.BASIC_ISO_DATE);//20180507 ldtFormatterList.add(1, DateTimeFormatter.ISO_LOCAL_TIME);//17:06:13.465 ldtFormatterList.add(2, DateTimeFormatter.ISO_LOCAL_DATE);//2018-05-07 ldtFormatterList.add(3, DateTimeFormatter.ISO_DATE);//2018-05-07 ldtFormatterList.add(4, DateTimeFormatter.ISO_TIME);//17:06:13.465 ldtFormatterList.add(5, DateTimeFormatter.ISO_DATE_TIME);//2018-05-07T17:06:13.465 ldtFormatterList.add(6, DateTimeFormatter.ISO_ORDINAL_DATE);//2018-127 if(!ldtFormatterList.isEmpty()){ LocalDateTime ldt = LocalDateTime.now(); ldtFormatterList.forEach(c -> { out.println(ldt.format(c)); }); //ldtFormatterList.forEach(out::println); } } }