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sun.util.calendar

public final Class Era

extends Object
Class Inheritance
Imports
java.util.Locale, .TimeZone
The class Era represents a calendar era that defines a period of time in which the same year numbering is used. For example, Gregorian year 2004 is Heisei 16 in the Japanese calendar system. An era starts at any point of time (Gregorian) that is represented by CalendarDate.

Eras that are applicable to a particular calendar system can be obtained by calling CalendarSystem#getEras one of which can be used to specify a date in CalendarDate.

The following era names are defined in this release. 

Calendar system         Era name         Since (in Gregorian)
  -----------------------------------------------------------------------
  Japanese calendar       Meiji            1868-01-01T00:00:00 local time
                          Taisho           1912-07-30T00:00:00 local time
                          Showa            1926-12-25T00:00:00 local time
                          Heisei           1989-01-08T00:00:00 local time
                          Reiwa            2019-05-01T00:00:00 local time
  -----------------------------------------------------------------------
Author
Masayoshi Okutsu
Since
1.5

Field Summary

Modifier and TypeField and Description
private final String
abbr

private int
hash

private final boolean
localTime

private final String
name

private final long
since

private final CalendarDate
sinceDate

Constructor Summary

AccessConstructor and Description
public
Era(String
the era name (e.g., "BeforeCommonEra" for the Julian calendar system)
name, String
the abbreviation of the era name (e.g., "B.C.E." for "BeforeCommonEra")
abbr, long
the time (millisecond offset from January 1, 1970 (Gregorian) UTC or local time) when the era starts, inclusive.
since, boolean
true if since specifies a local time; false if since specifies UTC
localTime)

Constructs an Era instance.

Method Summary

Modifier and TypeMethod and Description
public boolean
equals(Object o)

Overrides java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

public String
getAbbreviation()

public String
getDisplayName(Locale locale)

public String
getName()

public long
getSince(TimeZone zone)

public CalendarDate
getSinceDate()

public int
hashCode()

Overrides java.lang.Object.hashCode.

Returns a hash code value for this object.

public boolean
isLocalTime()

public String
toString()

Overrides java.lang.Object.toString.

Returns a string representation of the object.

Inherited from java.lang.Object:
clonefinalizegetClassnotifynotifyAllwaitwaitwait

Field Detail

abbrback to summary
private final String abbr
hashback to summary
private int hash
localTimeback to summary
private final boolean localTime
nameback to summary
private final String name
sinceback to summary
private final long since
sinceDateback to summary
private final CalendarDate sinceDate

Constructor Detail

Eraback to summary
public Era(String name, String abbr, long since, boolean localTime)

Constructs an Era instance.

Parameters
name:String

the era name (e.g., "BeforeCommonEra" for the Julian calendar system)

abbr:String

the abbreviation of the era name (e.g., "B.C.E." for "BeforeCommonEra")

since:long

the time (millisecond offset from January 1, 1970 (Gregorian) UTC or local time) when the era starts, inclusive.

localTime:boolean

true if since specifies a local time; false if since specifies UTC

Method Detail

equalsback to summary
public boolean equals(Object o)

Overrides java.lang.Object.equals.

Doc from java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

  • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
  • For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

getAbbreviationback to summary
public String getAbbreviation()
getDisplayNameback to summary
public String getDisplayName(Locale locale)
getNameback to summary
public String getName()
getSinceback to summary
public long getSince(TimeZone zone)
getSinceDateback to summary
public CalendarDate getSinceDate()
hashCodeback to summary
public int hashCode()

Overrides java.lang.Object.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.
isLocalTimeback to summary
public boolean isLocalTime()
toStringback to summary
public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object. Satisfying this method's contract implies a non-null result must be returned.