Enum Class MethodHandles.Lookup.ClassOption

java.lang.Object

java.lang.Enum<MethodHandles.Lookup.ClassOption>

java.lang.invoke.MethodHandles.Lookup.ClassOption

All Implemented Interfaces:

Serializable, Comparable<MethodHandles.Lookup.ClassOption>, Constable

Enclosing class:

MethodHandles.Lookup

public static enum MethodHandles.Lookup.ClassOption
extends Enum<MethodHandles.Lookup.ClassOption>

The set of class options that specify whether a hidden class created by Lookup::defineHiddenClass method is dynamically added as a new member to the nest of a lookup class and/or whether a hidden class has a strong relationship with the class loader marked as its defining loader.

Since:

15

Nested Class Summary

Nested classes/interfaces declared in class Enum

Enum.EnumDesc<E>

Modifier and Type	Class	Description
static final class	Enum.EnumDesc<E extends Enum<E>>	A nominal descriptor for an enum constant.

Enum Constant Summary

Enum Constants

Enum Constant	Description
NESTMATE	Specifies that a hidden class be added to nest of a lookup class as a nestmate.
STRONG	Specifies that a hidden class has a strong relationship with the class loader marked as its defining loader, as a normal class or interface has with its own defining loader.

Method Summary

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

Methods declared in class Enum

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

Modifier and Type	Method	Description
protected final Object	clone()	Throws CloneNotSupportedException.
final int	compareTo(MethodHandles.Lookup.ClassOption o)	Compares this enum with the specified object for order.
final Optional<Enum.EnumDesc<MethodHandles.Lookup.ClassOption>>	describeConstable()	Returns an enum descriptor EnumDesc for this instance, if one can be constructed, or an empty Optional if one cannot be.
final boolean	equals(Object other)	Returns true if the specified object is equal to this enum constant.
protected final void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. Finalization has been deprecated for removal.
final Class<MethodHandles.Lookup.ClassOption>	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.

Methods declared in class Object

getClass, notify, notifyAll, wait, wait, wait

Modifier and Type	Method	Description
final Class<? extends Object>	getClass()	Answers the unique instance of java.lang.Class which represents the class of the receiver.
final void	notify()	Causes one thread which is waiting on the receiver to be made ready to run.
final void	notifyAll()	Causes all threads which are waiting on the receiver to be made ready to run.
final void	wait()	Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
final void	wait(long time)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
final void	wait(long time, int frac)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

Enum Constant Details

NESTMATE

public static final MethodHandles.Lookup.ClassOption NESTMATE

Specifies that a hidden class be added to nest of a lookup class as a nestmate.

A hidden nestmate class has access to the private members of all classes and interfaces in the same nest.

See Also:

• Class.getNestHost()

STRONG

public static final MethodHandles.Lookup.ClassOption STRONG

Specifies that a hidden class has a strong relationship with the class loader marked as its defining loader, as a normal class or interface has with its own defining loader. This means that the hidden class may be unloaded if and only if its defining loader is not reachable and thus may be reclaimed by a garbage collector (JLS §12.7).

By default, a hidden class or interface may be unloaded even if the class loader that is marked as its defining loader is reachable.

See Java Language Specification:

12.7 Unloading of Classes and Interfaces

Method Details

values

public static MethodHandles.Lookup.ClassOption[] 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 MethodHandles.Lookup.ClassOption 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