Juan Pablo Prado juanpabloprado
juanpabloprado
/ LocalDateTimeFormattersJShell.java
Last active
April 27, 2019 21:39
LocalDateTime Formatters on the Java Shell tool
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| jshell> import java.util.ArrayList; | |
| jshell> import java.time.format.DateTimeFormatter; ^ | |
| jshell> ArrayList<DateTimeFormatter> ldtFormattersList = new ArrayList<>(); | |
| ldtFormattersList ==> [] | |
| jshell> ldtFormattersList.add(DateTimeFormatter.BASIC_ISO_DATE); | |
| $57 ==> true |
juanpabloprado
/ DateTimePredefinedFormattersJShell.java
Created
April 27, 2019 21:28
DateTime Predefined Formatters on the Java Shell tool
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| jshell> import static java.time.format.DateTimeFormatter.*; | |
| jshell> ld.format(ISO_WEEK_DATE); | |
| $43 ==> "2019-W17-6" | |
| jshell> import java.time.OffsetDateTime; | |
| jshell> OffsetDateTime odt = OffsetDateTime.now(); | |
| odt ==> 2019-04-27T16:22:54.724099-05:00 |
juanpabloprado
/ PeriodNormalizedJShell.java
Created
April 27, 2019 21:17
Period normalized method on the Java Shell tool
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| jshell> Period p1 = Period.parse("P0Y13M"); | |
| p1 ==> P13M | |
| jshell> "Original: " + p1 + " Normalized: " + p1.normalized(); | |
| $36 ==> "Original: P13M Normalized: P1Y1M" | |
| jshell> Period p2 = Period.parse("P2Y-1M"); | |
| p2 ==> P2Y-1M | |
| jshell> "Original: " + p2 + " Normalized: " + p2.normalized(); |
juanpabloprado
/ PeriodBetweenJShell.java
Created
April 27, 2019 21:02
Period between method on the Java Shell tool
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| shell> String WAR_OF_1812_START_DATE = "1812-06-18"; | |
| WAR_OF_1812_START_DATE ==> "1812-06-18" | |
| jshell> String WAR_OF_1812_END_DATE = "1815-02-18"; | |
| WAR_OF_1812_END_DATE ==> "1815-02-18" | |
| jshell> import java.time.LocalDate; | |
| jshell> LocalDate warBegins = LocalDate.parse(WAR_OF_1812_START_DATE); | |
| warBegins ==> 1812-06-18 |
juanpabloprado
/ PeriodIsJShell.java
Created
April 27, 2019 20:56
Period is[state] methods on the Java Shell tool
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| jshell> Period p1 = Period.parse("P10D").minusDays(10); | |
| p1 ==> P0D | |
| jshell> "Is zero: " + p1.isZero(); | |
| $24 ==> "Is zero: true" | |
| jshell> // Period equals negative value | |
| jshell> Period p2 = Period.parse("P2019M"); | |
| p2 ==> P2019M |
juanpabloprado
/ PeriodPlusMinusJShell.java
Created
April 27, 2019 20:48
Period plus/minus methods on the Java Shell tool
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| jshell> Period period = Period.of(5, 2, 1); | |
| period ==> P5Y2M1D | |
| jshell> period = period.plusYears(10); | |
| period ==> P15Y2M1D | |
| jshell> period = period.plusMonths(10); | |
| period ==> P15Y12M1D | |
| jshell> period = period.plusDays(15); |
juanpabloprado
/ PeriodJShell.java
Last active
April 27, 2019 20:39
Period Class on the Java Shell tool
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| jshell> Period P1 = Period.ofYears(1); // 1 year | |
| P1 ==> P1Y | |
| jshell> Period P2 = Period.ofMonths(12) // 1 year | |
| P2 ==> P12M | |
| jshell> Period P3 = Period.ofWeeks(52) // 1 year | |
| P3 ==> P364D | |
| jshell> Period P4 = Period.ofDays(366) // 1 year (leap) |
juanpabloprado
/ LocalDateAndTimePlusMinusJShell.java
Created
April 24, 2019 03:14
LocalDate and LocalTime plus/minus methods on the Java Shell tool
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| jshell> LocalDate ld = LocalDate.now(); | |
| ld ==> 2019-04-23 | |
| jshell> // All plus methods | |
| jshell> ld = ld.plusYears(1).plusMonths(12).plusWeeks(52).plusDays(365); | |
| ld ==> 2023-04-22 | |
| jshell> // All minus methods |
juanpabloprado
/ LegacyDateTimeJShell.java
Created
April 24, 2019 02:53
Legacy calendar classes on the Java Shell tool
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| jshell> import java.util.Calendar; | |
| jshell> import java.time.Instant; | |
| jshell> Calendar calendar = Calendar.getInstance(); | |
| calendar ==> java.util.GregorianCalendar[time=1556074159985,ar ... 600000,DST_OFFSET=3600000] | |
| jshell> Instant instant = calendar.toInstant(); | |
| instant ==> 2019-04-24T02:49:19.985Z |
juanpabloprado
/ LocalDateTimeJShell.java
Created
April 24, 2019 02:47
LocalDateTime Class on the Java Shell tool
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| jshell> LocalDateTime ldt1 = LocalDateTime.now(); | |
| ldt1 ==> 2019-04-23T21:41:59.084165 | |
| jshell> LocalDateTime ldt2 = LocalDateTime.parse("2019-01-01T12:00:00"); | |
| ldt2 ==> 2019-01-01T12:00 | |
| jshell> LocalDateTime ldt3 = LocalDateTime.of(2019, 1, 1, 12, 0); | |
| ldt3 ==> 2019-01-01T12:00 | |
| jshell> LocalDateTime ldt4 = LocalDateTime.of(2019, Month.JANUARY, 1, 12, 0); |