public final class

Era

extends Object
java.lang.Object
   ↳ sun.util.calendar.Era

Class Overview

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 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            1868-01-01 midnight local time
                           Taisho           1912-07-30 midnight local time
                           Showa            1926-12-26 midnight local time
                           Heisei           1989-01-08 midnight local time
   Julian calendar         BeforeCommonEra  -292275055-05-16T16:47:04.192Z
                           CommonEra        0000-12-30 midnight local time
   Taiwanese calendar      MinGuo           1911-01-01 midnight local time
   Thai Buddhist calendar  BuddhistEra      -543-01-01 midnight local time
   -----------------------------------------------------------------------

Summary

Public Constructors
Era(String name, String abbr, long since, boolean localTime)
Constructs an Era instance.
Public Methods
boolean equals(Object o)
Indicates whether some other object is "equal to" this one.
String getAbbreviation()
String getDiaplayAbbreviation(Locale locale)
String getDisplayName(Locale locale)
String getName()
long getSince(TimeZone zone)
CalendarDate getSinceDate()
int hashCode()
Returns a hash code value for the object.
boolean isLocalTime()
String toString()
Returns a string representation of the object.
[Expand]
Inherited Methods
From class java.lang.Object

Public Constructors

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

Constructs an Era instance.

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

Public Methods

public boolean equals (Object o)

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.

The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true).

Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.

Parameters
o the reference object with which to compare.
Returns
  • true if this object is the same as the obj argument; false otherwise.

public String getAbbreviation ()

public String getDiaplayAbbreviation (Locale locale)

public String getDisplayName (Locale locale)

public String getName ()

public long getSince (TimeZone zone)

public CalendarDate getSinceDate ()

public int hashCode ()

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

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(Object) 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(java.lang.Object) 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 hashtables.

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the JavaTM programming language.)

Returns
  • a hash code value for this object.

public boolean isLocalTime ()

public String toString ()

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of: 

 getClass().getName() + '@' + Integer.toHexString(hashCode())

Returns
  • a string representation of the object.