Module jp.ecuacion.util.poi

Package jp.ecuacion.util.poi.excel.enums

Enum Class NoDataString

java.lang.Object

java.lang.Enum<NoDataString>

jp.ecuacion.util.poi.excel.enums.NoDataString

All Implemented Interfaces:

Serializable, Comparable<NoDataString>, Constable

public enum NoDataString
extends Enum<NoDataString>

Has the selections which java gets when the value of a cell in an excel file is empty.

The word empty usually means a string is either null or "", but java empty string or for short empty string, exactly means "".
In this context hese two words are clearly distinguished so don't understand this wrong.

NULL means null, EMPTY_STRING means "".
NULL is recommended because usually values obtained from an excel file are validated with jakarta validation, and it consider null as valid, but empty("") as invalid.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
EMPTY_STRING	means empty string ("").
NULL	means null.

Method Summary

Modifier and Type	Method	Description
static NoDataString	valueOf(String name)	Returns the enum constant of this class with the specified name.
static NoDataString[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

NULL

public static final NoDataString NULL

means null. Recommended.

EMPTY_STRING

public static final NoDataString EMPTY_STRING

means empty string (""). NOT Recommended.

Method Details

values

public static NoDataString[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static NoDataString valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null