Java : IsoEra with Examples
Published : October 30, 2023
IsoEra (Java SE 20 & JDK 20) with Examples.
You will find code examples on most IsoEra methods.
Summary
An era in the ISO calendar system.
final var locale = Locale.getDefault();
System.out.println(locale.toLanguageTag()); // en-US
{
final var era = IsoEra.CE;
System.out.println(era.getValue()); // 1
final var name = era.getDisplayName(TextStyle.FULL, locale);
System.out.println(name); // Anno Domini
}
{
final var era = IsoEra.BCE;
System.out.println(era.getValue()); // 0
final var name = era.getDisplayName(TextStyle.FULL, locale);
System.out.println(name); // Before Christ
}
final var date1 = LocalDate.of(2100, 12, 31);
System.out.println(date1); // 2100-12-31
System.out.println(date1.getEra()); // CE
final var date2 = LocalDate.of(-99, 1, 2);
System.out.println(date2); // -0099-01-02
System.out.println(date2.getEra()); // BCE
Enum Constants
BCE
The singleton instance for the era before the current one, 'Before Current Era', which has the numeric value 0.
final var era = IsoEra.BCE;
System.out.println(era.name()); // BCE
System.out.println(era.getValue()); // 0
CE
The singleton instance for the current era, 'Current Era', which has the numeric value 1.
final var era = IsoEra.CE;
System.out.println(era.name()); // CE
System.out.println(era.getValue()); // 1
Methods
int getValue ()
Gets the numeric era int value.
final var era = IsoEra.CE;
System.out.println(era); // CE
System.out.println(era.getValue()); // 1
final var era = IsoEra.BCE;
System.out.println(era); // BCE
System.out.println(era.getValue()); // 0
static IsoEra of (int isoEra)
Obtains an instance of IsoEra from an int value.
final var era1 = IsoEra.of(0);
System.out.println(era1); // BCE
final var era2 = IsoEra.of(1);
System.out.println(era2); // CE
static IsoEra valueOf (String name)
Returns the enum constant of this class with the specified name.
final var era1 = IsoEra.valueOf("BCE");
System.out.println(era1); // BCE
final var era2 = IsoEra.valueOf("CE");
System.out.println(era2); // CE
static IsoEra[] values ()
Returns an array containing the constants of this enum class, in the order they are declared.
for (final var era : IsoEra.values()) {
System.out.println(era);
}
// Result
// ↓
//BCE
//CE
Methods declared in Enum
clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf
Please see the link below.
Methods declared in Era
adjustInto, get, getDisplayName, getLong, isSupported, query, range
Please see the link below.
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