Module java.base

Package java.lang.constant

Interface PackageDesc

public sealed interface PackageDesc

A nominal descriptor for a Package constant.

To create a PackageDesc for a package, use the of(String) or ofInternalName(String) method.

See Java Virtual Machine Specification:

4.4.12 The CONSTANT_Package_info Structure

Since:

21

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)	Compare the specified object with this descriptor for equality.
String	internalName()	Returns the fully qualified (slash-separated) package name in internal form of this PackageDesc.
default String	name()	Returns the fully qualified (dot-separated) package name of this PackageDesc.
static PackageDesc	of(String name)	Returns a PackageDesc for a package, given the name of the package, such as "java.lang".
static PackageDesc	ofInternalName(String name)	Returns a PackageDesc for a package, given the name of the package in internal form, such as "java/lang".

Method Details

of

static PackageDesc of(String name)

Returns a PackageDesc for a package, given the name of the package, such as "java.lang".

Parameters:

name - the fully qualified (dot-separated) package name

Returns:

a PackageDesc describing the desired package

Throws:

NullPointerException - if the argument is null

IllegalArgumentException - if the name string is not in the correct format

See Java Language Specification:

6.5.3 Module Names and Package Names

See Also:

• ofInternalName(String)

ofInternalName

static PackageDesc ofInternalName(String name)

Returns a PackageDesc for a package, given the name of the package in internal form, such as "java/lang".

Parameters:

name - the fully qualified package name, in internal (slash-separated) form

Returns:

a PackageDesc describing the desired package

Throws:

NullPointerException - if the argument is null

IllegalArgumentException - if the name string is not in the correct format

See Java Virtual Machine Specification:

4.2.1 Binary Class and Interface Names
4.2.3 Module and Package Names

See Also:

• of(String)

internalName

String internalName()

Returns the fully qualified (slash-separated) package name in internal form of this PackageDesc.

Returns:

the package name in internal form, or the empty string for the unnamed package

See Also:

• name()

name

default String name()

Returns the fully qualified (dot-separated) package name of this PackageDesc.

Returns:

the package name, or the empty string for the unnamed package

See Also:

• internalName()

equals

boolean equals(Object o)

Compare the specified object with this descriptor for equality. Returns true if and only if the specified object is also a PackageDesc and both describe the same package.

Overrides:

equals in class Object

Parameters:

o - the other object

Returns:

whether this descriptor is equal to the other object

See Also:

• Object.hashCode()
• HashMap