Added in API level 1

Summary: Protected Ctors | Methods | Protected Methods | Inherited Methods

Enum

public abstract class Enum
extends Object implements Comparable<E extends Enum<E>>, Serializable

java.lang.Object
↳	java.lang.Enum<E extends java.lang.Enum<E>>

Known direct subclasses

AccessMode, AclEntryFlag, AclEntryPermission, AclEntryType, Allocation.MipmapControl, AlphabeticIndex.Bucket.LabelType, AsyncTask.Status, Authenticator.RequestorType, Bitmap.CompressFormat, Bitmap.Config, BlendMode, BlurMaskFilter.Blur, CRLReason, Canvas.EdgeType, Canvas.VertexMode, and 147 others.

AccessMode	Defines access modes used to test the accessibility of a file.
AclEntryFlag	Defines the flags for used by the flags component of an ACL `entry`.
AclEntryPermission	Defines the permissions for use with the permissions component of an ACL `entry`.
AclEntryType	A typesafe enumeration of the access control entry types.
Allocation.MipmapControl	Controls mipmap behavior when using the bitmap creation and update functions.
AlphabeticIndex.Bucket.LabelType	Type of the label
AsyncTask.Status	Indicates the current status of the task.
Authenticator.RequestorType	The type of the entity requesting authentication.
Bitmap.CompressFormat	Specifies the known formats a bitmap can be compressed into
Bitmap.Config	Possible bitmap configurations.
BlendMode
BlurMaskFilter.Blur
CRLReason	The CRLReason enumeration specifies the reason that a certificate is revoked, as defined in RFC 5280: Internet X.509 Public Key Infrastructure Certificate and CRL Profile.
Canvas.EdgeType	This enum was deprecated in API level 30. quickReject no longer uses this.
Canvas.VertexMode
CertPathValidatorException.BasicReason	The BasicReason enumerates the potential reasons that a certification path of any type may be invalid.
Character.UnicodeScript	A family of character subsets representing the character scripts defined in the Unicode Standard Annex #24: Script Names.
ChronoField	A standard set of fields.
ChronoUnit	A standard set of date periods units.
ClientInfoStatus	Enumeration for status of the reason that a property could not be set via a call to `Connection.setClientInfo`
Collector.Characteristics	Characteristics indicating properties of a `Collector`, which can be used to optimize reduction implementations.
ColorSpace.Adaptation	List of adaptation matrices that can be used for chromatic adaptation using the von Kries transform.
ColorSpace.Model	A color model is required by a `ColorSpace` to describe the way colors can be represented as tuples of numbers.
ColorSpace.Named	List of common, named color spaces.
ColorSpace.RenderIntent	A render intent determines how a `connector` maps colors from one color space to another.
CompactDecimalFormat.CompactStyle	Style parameter for CompactDecimalFormat.
ConsoleMessage.MessageLevel
CryptoPrimitive	An enumeration of cryptographic primitives.
Currency.CurrencyUsage	Currency Usage used for Decimal Format
CursorJoiner.Result	The result of a call to next().
DateFormat.BooleanAttribute	boolean attributes
DateFormat.HourCycle	Hour Cycle
DateTimePatternGenerator.DisplayWidth	Field display name width constants for getFieldDisplayName
DayOfWeek	A day-of-week, such as 'Tuesday'.
DisplayContext	Display context settings.
DisplayContext.Type	Type values for DisplayContext
DisplayOptions.Capitalization	Represents all the capitalization options.
DisplayOptions.DisplayLength	Represents all the display lengths.
DisplayOptions.GrammaticalCase	Represents all the grammatical cases that are supported by CLDR.
DisplayOptions.NameStyle	Represents all the name styles.
DisplayOptions.NounClass	Represents all the grammatical noun classes that are supported by CLDR.
DisplayOptions.PluralCategory	Standard CLDR plural category constants.
DisplayOptions.SubstituteHandling	Represents all the substitute handlings.
DrbgParameters.Capability	The reseedable and prediction resistance capabilities of a DRBG.
Element.DataKind	The special interpretation of the data if required.
Element.DataType	DataType represents the basic type information for a basic element.
ElementType	The constants of this enumerated class provide a simple classification of the syntactic locations where annotations may appear in a Java program.
FileVisitOption	Defines the file tree traversal options.
FileVisitResult	The result type of a `FileVisitor`.
FormatStyle	Enumeration of the style of a localized date, time or date-time formatter.
Formatter.BigDecimalLayoutForm	Enum for `BigDecimal` formatting.
GradientDrawable.Orientation	Controls how the gradient is oriented relative to the drawable's bounds
HijrahEra	An era in the Hijrah calendar system.
IDNA.Error	IDNA error bit set values.
ImageView.ScaleType	Options for scaling the bounds of an image to the bounds of this view.
Interpolator.Result
IslamicCalendar.CalculationType	enumeration of available calendar calculation types
IsoEra	An era in the ISO calendar system.
JsonToken	A structure, name or value type in a JSON-encoded string.
KeyRep.Type	Key type.
Layout.Alignment
LinkOption	Defines the options as to how symbolic links are handled.
ListFormatter.Type	Type of meaning expressed by the list.
ListFormatter.Width	Verbosity level of the list patterns.
LocalSocketAddress.Namespace	The namespace that this address exists in.
Locale.Category	Enum for locale categories.
Locale.FilteringMode	This enum provides constants to select a filtering mode for locale matching.
Locale.IsoCountryCode	Enum for specifying the type defined in ISO 3166.
LocaleDisplayNames.DialectHandling	Enum used in `LocaleDisplayNames.getInstance(android.icu.util.ULocale, android.icu.text.LocaleDisplayNames.DialectHandling)`.
Matrix.ScaleToFit	Controls how the src rect should align into the dst rect for setRectToRect().
MeasureFormat.FormatWidth	Formatting width enum.
MeasureUnit.Complexity	Enumeration for unit complexity.
MeasureUnit.MeasurePrefix	Enumeration for SI and binary prefixes, e.g. "kilo-", "nano-", "mebi-".
MessagePattern.ApostropheMode	Mode for when an apostrophe starts quoted literal text for MessageFormat output.
MessagePattern.ArgType	Argument type constants.
MessagePattern.Part.Type	Part type constants.
MinguoEra	An era in the Minguo calendar system.
Month	A month-of-year, such as 'July'.
NetworkInfo.DetailedState	This enum was deprecated in API level 29. See `NetworkInfo`.
NetworkInfo.State	This enum was deprecated in API level 29. See `NetworkInfo`.
Normalizer.Form	This enum provides constants of the four Unicode normalization forms that are described in Unicode Standard Annex #15 — Unicode Normalization Forms and two methods to access them.
Normalizer2.Mode	Constants for normalization modes.
NumberFormatter.DecimalSeparatorDisplay	An enum declaring how to render the decimal separator.
NumberFormatter.GroupingStrategy	An enum declaring the strategy for when and how to display grouping separators (i.e., the separator, often a comma or period, after every 2-3 powers of ten).
NumberFormatter.RoundingPriority	An enum declaring how to resolve conflicts between maximum fraction digits and maximum significant digits.
NumberFormatter.SignDisplay	An enum declaring how to denote positive and negative numbers.
NumberFormatter.TrailingZeroDisplay	An enum declaring how to render trailing zeros.
NumberFormatter.UnitWidth	An enum declaring how to render units, including currencies.
NumberRangeFormatter.RangeCollapse	Defines how to merge fields that are identical across the range sign.
NumberRangeFormatter.RangeIdentityFallback	Defines the behavior when the two numbers in the range are identical after rounding.
NumberRangeFormatter.RangeIdentityResult	Used in the result class FormattedNumberRange to indicate to the user whether the numbers formatted in the range were equal or not, and whether or not the identity fallback was applied.
NumericShaper.Range	A `NumericShaper.Range` represents a Unicode range of a script having its own decimal digits.
PKIXReason	The `PKIXReason` enumerates the potential PKIX-specific reasons that an X.509 certification path may be invalid according to the PKIX (RFC 5280) standard.
PKIXRevocationChecker.Option	Various revocation options that can be specified for the revocation checking mechanism.
Paint.Align	Align specifies how drawText aligns its text relative to the [x,y] coordinates.
Paint.Cap	The Cap specifies the treatment for the beginning and ending of stroked lines and paths.
Paint.Join	The Join specifies the treatment where lines and curve segments join on a stroked path.
Paint.Style	The Style specifies if the primitive being drawn is filled, stroked, or both (in the same color).
Path.Direction	Specifies how closed shapes (e.g. rects, ovals) are oriented when they are added to a path.
Path.FillType	Enum for the ways a path may be filled.
Path.Op	The logical operations that can be performed when combining two paths.
PathDashPathEffect.Style
PluralRules.PluralType	Type of plurals and PluralRules.
PorterDuff.Mode	The name of the parent class is an homage to the work of Thomas Porter and Tom Duff, presented in their seminal 1984 paper titled "Compositing Digital Images".
PosixFilePermission	Defines the bits for use with the `permissions` attribute.
ProcessBuilder.Redirect.Type	The type of a `Redirect`.
Proxy.Type	Represents the proxy type.
Region.Op
RelativeDateTimeFormatter.AbsoluteUnit	Represents an absolute unit.
RelativeDateTimeFormatter.Direction	Represents a direction for an absolute unit e.g "Next Tuesday" or "Last Tuesday"
RelativeDateTimeFormatter.RelativeDateTimeUnit	Represents the unit for formatting a relative date.
RelativeDateTimeFormatter.RelativeUnit	Represents the unit for formatting a relative date.
RelativeDateTimeFormatter.Style	The formatting style
RenderScript.ContextType	ContextType specifies the specific type of context to be created.
RenderScript.Priority	RenderScript worker thread priority enumeration.
ResolverStyle	Enumeration of different ways to resolve dates and times.
RetentionPolicy	Annotation retention policy.
RoundingMode	Specifies a rounding policy for numerical operations capable of discarding precision.
RowIdLifetime	Enumeration for RowId life-time values.
SSLEngineResult.HandshakeStatus	An `SSLEngineResult` enum describing the current handshaking state of this `SSLEngine`.
SSLEngineResult.Status	An `SSLEngineResult` enum describing the overall result of the `SSLEngine` operation.
Sampler.Value
SearchIterator.ElementComparisonType	Option to control how collation elements are compared.
Shader.TileMode
SignStyle	Enumeration of ways to handle the positive/negative sign.
SmsMessage.MessageClass	SMS Class enumeration.
StackWalker.Option	Stack walker option to configure the stack frame information obtained by a `StackWalker`.
StandardCopyOption	Defines the standard copy options.
StandardOpenOption	Defines the standard open options.
StandardProtocolFamily	Defines the standard families of communication protocols.
SupplicantState	From `defs.h` in `wpa_supplicant`.
TextKeyListener.Capitalize
TextStyle	Enumeration of the style of text formatting and parsing.
TextUtils.TruncateAt
TextView.BufferType	Type of the text buffer that defines the characteristics of the text such as static, styleable, or editable.
ThaiBuddhistEra	An era in the Thai Buddhist calendar system.
Thread.State	A thread state.
TimeUnit	A `TimeUnit` represents time durations at a given unit of granularity and provides utility methods to convert across units, and to perform timing and delay operations in these units.
TimeZone.SystemTimeZoneType	[icu] System time zone type constants used by filtering zones in `TimeZone#getAvailableIDs(SystemTimeZoneType, String, Integer)`
TimeZoneFormat.GMTOffsetPatternType	Offset pattern type enum.
TimeZoneFormat.ParseOption	Parse option enum, used for specifying optional parse behavior.
TimeZoneFormat.Style	Time zone display format style enum used by format/parse APIs in `TimeZoneFormat`.
TimeZoneFormat.TimeType	Time type enum used for receiving time type (standard time, daylight time or unknown) in `TimeZoneFormat` APIs.
TimeZoneNames.NameType	Time zone display name types
Type.CubemapFace
ULocale.AvailableType	Types for `ULocale#getAvailableLocalesByType`
ULocale.Category	Enum for locale categories.
UScript.ScriptUsage	Script usage constants.
UnicodeSet.ComparisonStyle	Comparison style enums used by `UnicodeSet#compareTo(UnicodeSet, ComparisonStyle)`.
UnicodeSet.SpanCondition	Argument values for whether span() and similar functions continue while the current character is contained vs.
UnicodeSetSpanner.CountMethod	Options for replaceFrom and countIn to control how to treat each matched span.
UnicodeSetSpanner.TrimOption	Options for the trim() method
VarHandle.AccessMode	The set of access modes that specify how a variable, referenced by a VarHandle, is accessed.
ViewDebug.HierarchyTraceType	This enum was deprecated in API level 16. This enum is now unused
ViewDebug.RecyclerTraceType	This enum was deprecated in API level 16. This enum is now unused
WebSettings.LayoutAlgorithm	Enum for controlling the layout of html.
WebSettings.PluginState	The plugin state effects how plugins are treated on a page.
WebSettings.RenderPriority
WebSettings.TextSize	This enum was deprecated in API level 15. Use `WebSettings#setTextZoom(int)` and `WebSettings#getTextZoom()` instead.
WebSettings.ZoomDensity	Enum for specifying the WebView's desired density.
Xml.Encoding	Supported character encodings.
ZoneOffsetTransitionRule.TimeDefinition	A definition of the way a local time can be converted to the actual transition date-time.

This is the common base class of all Java language enumeration classes. More information about enums, including descriptions of the implicitly declared methods synthesized by the compiler, can be found in section {@jls 8.9} of The Java Language Specification. Enumeration classes are all serializable and receive special handling by the serialization mechanism. The serialized representation used for enum constants cannot be customized. Declarations of methods and fields that would otherwise interact with serialization are ignored, including serialVersionUID; see the Java Object Serialization Specification for details.

Note that when using an enumeration type as the type of a set or as the type of the keys in a map, specialized and efficient set and map implementations are available.

See also:

Summary

Protected constructors
`Enum(String name, int ordinal)` Sole constructor.

Public methods
`final int`	`compareTo(E o)` Compares this enum with the specified object for order.
`final boolean`	`equals(Object other)` Returns true if the specified object is equal to this enum constant.
`final Class<E>`	`getDeclaringClass()` Returns the Class object corresponding to this enum constant's enum type.
`final int`	`hashCode()` Returns a hash code for this enum constant.
`final String`	`name()` Returns the name of this enum constant, exactly as declared in its enum declaration.
`final int`	`ordinal()` Returns the ordinal of this enumeration constant (its position in its enum declaration, where the initial constant is assigned an ordinal of zero).
`String`	`toString()` Returns the name of this enum constant, as contained in the declaration.
`static <T extends Enum<T>> T`	`valueOf(Class<T> enumClass, String name)` Returns the enum constant of the specified enum class with the specified name.

Protected methods
`final Object`	`clone()` Throws CloneNotSupportedException.
`final void`	`finalize()` enum classes cannot have finalize methods.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

From interface


        
          java.lang.Comparable


      compareTo(E o)

Compares this object with the specified object for order.

Protected constructors

Enum

Added in API level 1

protected Enum (String name, 
                int ordinal)

Sole constructor. Programmers cannot invoke this constructor. It is for use by code emitted by the compiler in response to enum class declarations.

Parameters
`name`	`String`: - The name of this enum constant, which is the identifier used to declare it.
`ordinal`	`int`: - The ordinal of this enumeration constant (its position in the enum declaration, where the initial constant is assigned an ordinal of zero).

Public methods

compareTo

Added in API level 1

public final int compareTo (E o)

Compares this enum with the specified object for order. Returns a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object. Enum constants are only comparable to other enum constants of the same enum type. The natural order implemented by this method is the order in which the constants are declared.

Parameters
`o`	`E`

Returns
`int`

equals

Added in API level 1

public final boolean equals (Object other)

Returns true if the specified object is equal to this enum constant.

Parameters
`other`	`Object`: the object to be compared for equality with this object.

Returns
`boolean`	true if the specified object is equal to this enum constant.

getDeclaringClass

Added in API level 1

public final Class<E> getDeclaringClass ()

Returns the Class object corresponding to this enum constant's enum type. Two enum constants e1 and e2 are of the same enum type if and only if e1.getDeclaringClass() == e2.getDeclaringClass(). (The value returned by this method may differ from the one returned by the Object#getClass method for enum constants with constant-specific class bodies.)

Returns
`Class<E>`	the Class object corresponding to this enum constant's enum type

hashCode

Added in API level 1

public final int hashCode ()

Returns a hash code for this enum constant.

Returns
`int`	a hash code for this enum constant.

name

Added in API level 1

public final String name ()

Returns the name of this enum constant, exactly as declared in its enum declaration. Most programmers should use the toString() method in preference to this one, as the toString method may return a more user-friendly name. This method is designed primarily for use in specialized situations where correctness depends on getting the exact name, which will not vary from release to release.

Returns
`String`	the name of this enum constant

ordinal

Added in API level 1

public final int ordinal ()

Returns the ordinal of this enumeration constant (its position in its enum declaration, where the initial constant is assigned an ordinal of zero). Most programmers will have no use for this method. It is designed for use by sophisticated enum-based data structures, such as EnumSet and EnumMap.

Returns
`int`	the ordinal of this enumeration constant

toString

Added in API level 1

public String toString ()

Returns the name of this enum constant, as contained in the declaration. This method may be overridden, though it typically isn't necessary or desirable. An enum class should override this method when a more "programmer-friendly" string form exists.

Returns
`String`	the name of this enum constant

valueOf

Added in API level 1

public static T valueOf (Class<T> enumClass, 
                String name)

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

Note that for a particular enum class T, the implicitly declared public static T valueOf(String) method on that enum may be used instead of this method to map from a name to the corresponding enum constant. All the constants of an enum class can be obtained by calling the implicit public static T[] values() method of that class.

Parameters
`enumClass`	`Class`: the `Class` object of the enum class from which to return a constant
`name`	`String`: the name of the constant to return

Returns
`T`	the enum constant of the specified enum class with the specified name

Throws
`IllegalArgumentException`	if the specified enum class has no constant with the specified name, or the specified class object does not represent an enum class
`NullPointerException`	if `enumClass` or `name` is null

Protected methods

clone

Added in API level 1

protected final Object clone ()

Throws CloneNotSupportedException. This guarantees that enums are never cloned, which is necessary to preserve their "singleton" status.

Returns
`Object`	(never returns)

Throws
`CloneNotSupportedException`

finalize

Added in API level 1

protected final void finalize ()

enum classes cannot have finalize methods.