java.base (Java SE 9 & JDK 9 ) (original) (raw)

java.io

Provides for system input and output through data streams, serialization and the file system.

java.lang

Provides classes that are fundamental to the design of the Java programming language.

java.lang.annotation

Provides library support for the Java programming language annotation facility.

java.lang.invoke

The java.lang.invoke package contains dynamic language support provided directly by the Java core class libraries and virtual machine.

java.lang.module

Classes to support module descriptors and creating configurations of modules by means of resolution and service binding.

java.lang.ref

Provides reference-object classes, which support a limited degree of interaction with the garbage collector.

java.lang.reflect

Provides classes and interfaces for obtaining reflective information about classes and objects.

java.math

Provides classes for performing arbitrary-precision integer arithmetic (BigInteger) and arbitrary-precision decimal arithmetic (BigDecimal).

java.net

Provides the classes for implementing networking applications.

java.net.spi

Service-provider classes for the java.net package.

java.nio

Defines buffers, which are containers for data, and provides an overview of the other NIO packages.

java.nio.channels

Defines channels, which represent connections to entities that are capable of performing I/O operations, such as files and sockets; defines selectors, for multiplexed, non-blocking I/O operations.

java.nio.channels.spi

java.nio.charset

Defines charsets, decoders, and encoders, for translating between bytes and Unicode characters.

java.nio.charset.spi

java.nio.file

Defines interfaces and classes for the Java virtual machine to access files, file attributes, and file systems.

java.nio.file.attribute

Interfaces and classes providing access to file and file system attributes.

java.nio.file.spi

Service-provider classes for the java.nio.file package.

java.security

Provides the classes and interfaces for the security framework.

java.security.acl

The classes and interfaces in this package have been deprecated.

java.security.cert

Provides classes and interfaces for parsing and managing certificates, certificate revocation lists (CRLs), and certification paths.

java.security.interfaces

Provides interfaces for generating RSA (Rivest, Shamir and Adleman AsymmetricCipher algorithm) keys as defined in the RSA Laboratory Technical Note PKCS#1, and DSA (Digital Signature Algorithm) keys as defined in NIST's FIPS-186.

java.security.spec

Provides classes and interfaces for key specifications and algorithm parameter specifications.

java.text

Provides classes and interfaces for handling text, dates, numbers, and messages in a manner independent of natural languages.

java.text.spi

Service provider classes for the classes in the java.text package.

java.time

The main API for dates, times, instants, and durations.

java.time.chrono

Generic API for calendar systems other than the default ISO.

java.time.format

Provides classes to print and parse dates and times.

java.time.temporal

Access to date and time using fields and units, and date time adjusters.

java.time.zone

Support for time-zones and their rules.

java.util

Contains the collections framework, some internationalization support classes, a service loader, properties, random number generation, string parsing and scanning classes, base64 encoding and decoding, a bit array, and several miscellaneous utility classes.

java.util.concurrent

Utility classes commonly useful in concurrent programming.

java.util.concurrent.atomic

A small toolkit of classes that support lock-free thread-safe programming on single variables.

java.util.concurrent.locks

Interfaces and classes providing a framework for locking and waiting for conditions that is distinct from built-in synchronization and monitors.

java.util.function

Functional interfaces provide target types for lambda expressions and method references.

java.util.jar

Provides classes for reading and writing the JAR (Java ARchive) file format, which is based on the standard ZIP file format with an optional manifest file.

java.util.regex

Classes for matching character sequences against patterns specified by regular expressions.

java.util.spi

Service provider classes for the classes in the java.util package.

java.util.stream

Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.

java.util.zip

Provides classes for reading and writing the standard ZIP and GZIP file formats.

javax.crypto

Provides the classes and interfaces for cryptographic operations.

javax.crypto.interfaces

Provides interfaces for Diffie-Hellman keys as defined in RSA Laboratories' PKCS #3.

javax.crypto.spec

Provides classes and interfaces for key specifications and algorithm parameter specifications.

javax.net

Provides classes for networking applications.

javax.net.ssl

Provides classes for the secure socket package.

javax.security.auth

This package provides a framework for authentication and authorization.

javax.security.auth.callback

This package provides the classes necessary for services to interact with applications in order to retrieve information (authentication data including usernames or passwords, for example) or to display information (error and warning messages, for example).

javax.security.auth.login

This package provides a pluggable authentication framework.

javax.security.auth.spi

This package provides the interface to be used for implementing pluggable authentication modules.

javax.security.auth.x500

This package contains the classes that should be used to store X500 Principal and X500 Private Credentials in a_Subject_.

javax.security.cert

Provides classes for public key certificates.