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Summary: Methods | Inherited Methods | [Expand All]

Added in API level 1

public class

Package

extends Object
implements AnnotatedElement

java.lang.Object
↳	java.lang.Package

Class Overview

Contains information about a Java package. This includes implementation and specification versions. Typically this information is retrieved from the manifest.

Packages are managed by class loaders. All classes loaded by the same loader from the same package share a Package instance.

See also:

ClassLoader

Summary

Public Methods
<A extends Annotation> A	getAnnotation(Class<A> annotationType) Returns the annotation associated with the specified annotation type and this package, if present.
Annotation[]	getAnnotations() Returns an array of this package's annotations.
Annotation[]	getDeclaredAnnotations() Returns an array of this package's declared annotations.
String	getImplementationTitle() Returns the title of the implementation of this package, or `null` if this is unknown.
String	getImplementationVendor() Returns the name of the vendor or organization that provides this implementation of the package, or `null` if this is unknown.
String	getImplementationVersion() Returns the version of the implementation of this package, or `null` if this is unknown.
String	getName() Returns the name of this package in the standard dot notation; for example: "java.lang".
static Package	getPackage(String packageName) Attempts to locate the requested package in the caller's class loader.
static Package[]	getPackages() Returns all the packages known to the caller's class loader.
String	getSpecificationTitle() Returns the title of the specification this package implements, or `null` if this is unknown.
String	getSpecificationVendor() Returns the name of the vendor or organization that owns and maintains the specification this package implements, or `null` if this is unknown.
String	getSpecificationVersion() Returns the version of the specification this package implements, or `null` if this is unknown.
int	hashCode() Returns an integer hash code for this object.
boolean	isAnnotationPresent(Class<? extends Annotation> annotationType) Indicates whether the specified annotation is present.
boolean	isCompatibleWith(String version) Indicates whether this package's specification version is compatible with the specified version string.
boolean	isSealed(URL url) Indicates whether this package is sealed with respect to the specified URL.
boolean	isSealed() Indicates whether this package is sealed.
String	toString() Returns a string containing a concise, human-readable description of this object.

[Expand]

Inherited Methods

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

From interface java.lang.reflect.AnnotatedElement

Public Methods

public A getAnnotation (Class<A> annotationType)

Added in API level 9

Returns the annotation associated with the specified annotation type and this package, if present.

Parameters
`annotationType`	`Class`: the annotation type to look for.

Returns
`A`	an instance of `Annotation` or `null`.

See also:

getAnnotation(java.lang.Class)

public Annotation[] getAnnotations ()

Added in API level 1

Returns an array of this package's annotations.

Returns
`Annotation[]`	an array of all annotations for this element

public Annotation[] getDeclaredAnnotations ()

Added in API level 1

Returns an array of this package's declared annotations. Package annotations aren't inherited, so this is equivalent to getAnnotations().

Returns
`Annotation[]`	an array of annotations declared for this element

public String getImplementationTitle ()

Added in API level 1

Returns the title of the implementation of this package, or null if this is unknown. The format of this string is unspecified.

Returns
`String`	the implementation title, may be `null`.

public String getImplementationVendor ()

Added in API level 1

Returns the name of the vendor or organization that provides this implementation of the package, or null if this is unknown. The format of this string is unspecified.

Returns
`String`	the implementation vendor name, may be `null`.

public String getImplementationVersion ()

Added in API level 1

Returns the version of the implementation of this package, or null if this is unknown. The format of this string is unspecified.

Returns
`String`	the implementation version, may be `null`.

public String getName ()

Added in API level 1

Returns the name of this package in the standard dot notation; for example: "java.lang".

Returns
`String`	the name of this package.

public static Package getPackage (String packageName)

Added in API level 1

Attempts to locate the requested package in the caller's class loader. If no package information can be located, null is returned.

Parameters
`packageName`	`String`: the name of the package to find.

Returns
`Package`	the requested package, or `null`.

See also:

getPackage(java.lang.String)

public static Package[] getPackages ()

Added in API level 1

Returns all the packages known to the caller's class loader.

Returns
`Package[]`	all the packages known to the caller's class loader.

See also:

getPackages()

public String getSpecificationTitle ()

Added in API level 1

Returns the title of the specification this package implements, or null if this is unknown.

Returns
`String`	the specification title, may be `null`.

public String getSpecificationVendor ()

Added in API level 1

Returns the name of the vendor or organization that owns and maintains the specification this package implements, or null if this is unknown.

Returns
`String`	the specification vendor name, may be `null`.

public String getSpecificationVersion ()

Added in API level 1

Returns the version of the specification this package implements, or null if this is unknown. The version string is a sequence of non-negative integers separated by dots; for example: "1.2.3".

Returns
`String`	the specification version string, may be `null`.

public int hashCode ()

Added in API level 1

Returns an integer hash code for this object. By contract, any two objects for which equals(Object) returns true must return the same hash code value. This means that subclasses of Object usually override both methods or neither method.

Note that hash values must not change over time unless information used in equals comparisons also changes.

See Writing a correct hashCode method if you intend implementing your own hashCode method.

Returns
`int`	this object's hash code.

public boolean isAnnotationPresent (Class<? extends Annotation> annotationType)

Added in API level 1

Indicates whether the specified annotation is present.

Parameters
`annotationType`	`Class`: the annotation type to look for.

Returns
`boolean`	`true` if the annotation is present; `false` otherwise.

See also:

isAnnotationPresent(java.lang.Class)

public boolean isCompatibleWith (String version)

Added in API level 1

Indicates whether this package's specification version is compatible with the specified version string. Version strings are compared by comparing each dot separated part of the version as an integer.

Parameters
`version`	`String`: the version string to compare against.

Returns
`boolean`	`true` if the package versions are compatible; `false` otherwise.

Throws
`NumberFormatException`	if this package's version string or the one provided are not in the correct format.

public boolean isSealed (URL url)

Added in API level 1

Indicates whether this package is sealed with respect to the specified URL.

Parameters
`url`	`URL`: the URL to check.

Returns
`boolean`	`true` if this package is sealed with `url`; `false` otherwise

public boolean isSealed ()

Added in API level 1

Indicates whether this package is sealed.

Returns
`boolean`	`true` if this package is sealed; `false` otherwise.

public String toString ()

Added in API level 1

Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:

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

See Writing a useful toString method if you intend implementing your own toString method.

Returns
`String`	a printable representation of this object.

Mar	APR	May
	18
2015	2016	2017

Results

Annotations

Interfaces

Classes

Enums

Exceptions

Errors

Package

Class Overview

Summary

Public Methods

public A getAnnotation (Class<A> annotationType)

public Annotation[] getAnnotations ()

public Annotation[] getDeclaredAnnotations ()

public String getImplementationTitle ()

public String getImplementationVendor ()

public String getImplementationVersion ()

public String getName ()

public static Package getPackage (String packageName)

public static Package[] getPackages ()

public String getSpecificationTitle ()

public String getSpecificationVendor ()

public String getSpecificationVersion ()

public int hashCode ()

public boolean isAnnotationPresent (Class<? extends Annotation> annotationType)

public boolean isCompatibleWith (String version)

public boolean isSealed (URL url)

public boolean isSealed ()

public String toString ()