JapaneseEra

java.lang.Object
- java.time.chrono.JapaneseEra

所有已实现的接口:

Serializable, Era, TemporalAccessor, TemporalAdjuster
```
public final class JapaneseEra
extends Object
implements Era, Serializable
```
An era in the Japanese Imperial calendar system.
The Japanese government defines the official name and start date of each era. Eras are consecutive and their date ranges do not overlap, so the end date of one era is always the day before the start date of the next era.
The Java SE Platform supports all eras defined by the Japanese government, beginning with the Meiji era. Each era is identified in the Platform by an integer value and a name. The of(int) and valueOf(java.lang.String) methods may be used to obtain a singleton instance of JapaneseEra for each era. The values() method returns the singleton instances of all supported eras.
For convenience, this class declares a number of public static final fields that refer to singleton instances returned by the values() method.

从以下版本开始:

1.8

另请参阅:

序列化表格

字段概要

字段
限定符和类型	字段	说明
`static JapaneseEra`	`HEISEI`	The singleton instance for the 'Heisei' era (1989-01-08 - 2019-04-30) which has the value 2.
`static JapaneseEra`	`MEIJI`	The singleton instance for the 'Meiji' era (1868-01-01 - 1912-07-29) which has the value -1.
`static JapaneseEra`	`SHOWA`	The singleton instance for the 'Showa' era (1926-12-25 - 1989-01-07) which has the value 1.
`static JapaneseEra`	`TAISHO`	The singleton instance for the 'Taisho' era (1912-07-30 - 1926-12-24) which has the value 0.

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法	说明
`String`	`getDisplayName(TextStyle style, Locale locale)`	Gets the textual representation of this era.
`int`	`getValue()`	Gets the numeric era `int` value.
`static JapaneseEra`	`of(int japaneseEra)`	Obtains an instance of `JapaneseEra` from an `int` value.
`ValueRange`	`range(TemporalField field)`	Gets the range of valid values for the specified field.
`String`	`toString()`	Returns a string representation of the object.
`static JapaneseEra`	`valueOf(String japaneseEra)`	Returns the `JapaneseEra` with the name.
`static JapaneseEra[]`	`values()`	Returns an array of JapaneseEras.

从接口继承的方法 java.time.chrono.Era
adjustInto, get, getLong, isSupported, query

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- 字段详细资料
  - HEISEI
```
public static final JapaneseEra HEISEI
```
    The singleton instance for the 'Heisei' era (1989-01-08 - 2019-04-30) which has the value 2.
  - MEIJI
```
public static final JapaneseEra MEIJI
```
    The singleton instance for the 'Meiji' era (1868-01-01 - 1912-07-29) which has the value -1.
  - SHOWA
```
public static final JapaneseEra SHOWA
```
    The singleton instance for the 'Showa' era (1926-12-25 - 1989-01-07) which has the value 1.
  - TAISHO
```
public static final JapaneseEra TAISHO
```
    The singleton instance for the 'Taisho' era (1912-07-30 - 1926-12-24) which has the value 0.
- 方法详细资料
  - of
```
public static JapaneseEra of(int japaneseEra)
```
    Obtains an instance of JapaneseEra from an int value.
    - The value 1 is associated with the 'Showa' era, because it contains 1970-01-01 (ISO calendar system).
    - The values -1 and 0 are associated with two earlier eras, Meiji and Taisho, respectively.
    - A value greater than 1 is associated with a later era, beginning with Heisei (2).
    Every instance of JapaneseEra that is returned from the values() method has an int value (available via Era#getValue() which is accepted by this method.
    参数:
    
    japaneseEra - the era to represent
    
    返回:
    
    the JapaneseEra singleton, not null
    
    抛出:
    
    DateTimeException - if the value is invalid
  - valueOf
```
public static JapaneseEra valueOf(String japaneseEra)
```
    Returns the JapaneseEra with the name.
    The string must match exactly the name of the era. (Extraneous whitespace characters are not permitted.)
    
    参数:
    
    japaneseEra - the japaneseEra name; non-null
    
    返回:
    
    the JapaneseEra singleton, never null
    
    抛出:
    
    IllegalArgumentException - if there is not JapaneseEra with the specified name
  - values
```
public static JapaneseEra[] values()
```
    Returns an array of JapaneseEras.
    This method may be used to iterate over the JapaneseEras as follows:
```
 for (JapaneseEra c : JapaneseEra.values())
     System.out.println(c);
 
```
    返回:
    
    an array of JapaneseEras
  - getDisplayName
```
public String getDisplayName(TextStyle style,
                             Locale locale)
```
    Gets the textual representation of this era.
    This returns the textual name used to identify the era, suitable for presentation to the user. The parameters control the style of the returned text and the locale.
    If no textual mapping is found then the numeric value is returned.
    
    指定者:
    
    getDisplayName 在接口中 Era
    
    参数:
    
    style - the style of the text required, not null
    
    locale - the locale to use, not null
    
    返回:
    
    the text value of the era, not null
  - getValue
```
public int getValue()
```
    Gets the numeric era int value.
    The SHOWA era that contains 1970-01-01 (ISO calendar system) has the value 1. Later eras are numbered from 2 (HEISEI). Earlier eras are numbered 0 (TAISHO), -1 (MEIJI)).
    
    指定者:
    
    getValue 在接口中 Era
    
    返回:
    
    the era value
  - range
```
public ValueRange range(TemporalField field)
```
    Gets the range of valid values for the specified field.
    The range object expresses the minimum and maximum valid values for a field. This era is used to enhance the accuracy of the returned range. If it is not possible to return the range, because the field is not supported or for some other reason, an exception is thrown.
    If the field is a ChronoField then the query is implemented here. The ERA field returns the range. All other ChronoField instances will throw an UnsupportedTemporalTypeException.
    If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.rangeRefinedBy(TemporalAccessor) passing this as the argument. Whether the range can be obtained is determined by the field.
    The range of valid Japanese eras can change over time due to the nature of the Japanese calendar system.
    
    指定者:
    
    range 在接口中 Era
    
    指定者:
    
    range 在接口中 TemporalAccessor
    
    参数:
    
    field - the field to query the range for, not null
    
    返回:
    
    the range of valid values for the field, not null
    
    抛出:
    
    DateTimeException - if the range for the field cannot be obtained
    
    UnsupportedTemporalTypeException - if the unit is not supported
  - toString
```
public String toString()
```
    从类复制的说明: Object
    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())
    覆盖:
    
    toString 在类中 Object
    
    返回:
    
    a string representation of the object.

类 JapaneseEra

字段概要

方法概要

从接口继承的方法 java.time.chrono.Era

从类继承的方法 java.lang.Object

字段详细资料

HEISEI

MEIJI

SHOWA

TAISHO

方法详细资料

of

valueOf

values

getDisplayName

getValue

range

toString