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/OpenJDK 25

Interface PackageEntry

All Superinterfaces:
PoolEntry
public sealed interface PackageEntry extends PoolEntry
Models a CONSTANT_Package_info, representing a package, in the constant pool of a class file.

The use of a PackageEntry is represented by a PackageDesc that does not represent the unnamed package. Conversions are through ConstantPoolBuilder.packageEntry(PackageDesc) and asSymbol().

A package entry is composite: 

PackageEntry(Utf8Entry name)
where name is the internal form of a binary package name and is not empty.
See Java Virtual Machine Specification:
4.4.12 The CONSTANT_Package_info Structure
Since:
24

Field Summary

Fields declared in interface PoolEntry

TAG_CLASS, TAG_DOUBLE, TAG_DYNAMIC, TAG_FIELDREF, TAG_FLOAT, TAG_INTEGER, TAG_INTERFACE_METHODREF, TAG_INVOKE_DYNAMIC, TAG_LONG, TAG_METHOD_HANDLE, TAG_METHOD_TYPE, TAG_METHODREF, TAG_MODULE, TAG_NAME_AND_TYPE, TAG_PACKAGE, TAG_STRING, TAG_UTF8

Method Summary

Modifier and Type Method Description
PackageDesc asSymbol()
Returns a symbolic descriptor for the package name.
boolean matches(PackageDesc desc)
Returns whether this entry describes the given package.
Utf8Entry name()
Returns the internal form of the package name.

Methods declared in interface PoolEntry

constantPool, index, tag, width

Method Details

name

Utf8Entry name()
Returns the internal form of the package name.
Returns:
the internal form of the package name

asSymbol

PackageDesc asSymbol()
Returns a symbolic descriptor for the package name.
API Note:
If only symbol equivalence is desired, matches should be used. It requires reduced parsing and can improve class file reading performance.
Returns:
a symbolic descriptor for the package name

matches

boolean matches(PackageDesc desc)
Returns whether this entry describes the given package.
Parameters:
desc - the package descriptor
Returns:
whether this entry describes the given package
Since:
25

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/classfile/constantpool/PackageEntry.html