Defines the foundational APIs of the Java SE Platform.
- The JDK implementation of this module provides an implementation of
the jrt file system provider to enumerate and read the class and resource
files in a run-time image.
The jrt file system can be created by calling
- Tool Guides:
- java launcher, keytool
Exports Package Description java.ioProvides for system input and output through data streams, serialization and the file system. java.langProvides classes that are fundamental to the design of the Java programming language. java.lang.annotationProvides library support for the Java programming language annotation facility. java.lang.constantClasses and interfaces to represent nominal descriptors for run-time entities such as classes or method handles, and classfile entities such as constant pool entries or
java.lang.invokepackage provides low-level primitives for interacting with the Java Virtual Machine.
java.lang.moduleClasses to support module descriptors and creating configurations of modules by means of resolution and service binding. java.lang.refProvides reference-object classes, which support a limited degree of interaction with the garbage collector. java.lang.reflectProvides classes and interfaces for obtaining reflective information about classes and objects. java.mathProvides classes for performing arbitrary-precision integer arithmetic (
BigInteger) and arbitrary-precision decimal arithmetic (
java.netProvides the classes for implementing networking applications. java.net.spiService-provider classes for the
java.nioDefines buffers, which are containers for data, and provides an overview of the other NIO packages. java.nio.channelsDefines 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.spiService-provider classes for the
java.nio.charsetDefines charsets, decoders, and encoders, for translating between bytes and Unicode characters. java.nio.charset.spiService-provider classes for the
java.nio.fileDefines interfaces and classes for the Java virtual machine to access files, file attributes, and file systems. java.nio.file.attributeInterfaces and classes providing access to file and file system attributes. java.nio.file.spiService-provider classes for the
java.securityProvides the classes and interfaces for the security framework. java.security.aclThe classes and interfaces in this package have been deprecated. java.security.certProvides classes and interfaces for parsing and managing certificates, certificate revocation lists (CRLs), and certification paths. java.security.interfacesProvides 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.specProvides classes and interfaces for key specifications and algorithm parameter specifications. java.textProvides classes and interfaces for handling text, dates, numbers, and messages in a manner independent of natural languages. java.text.spiService provider classes for the classes in the java.text package. java.timeThe main API for dates, times, instants, and durations. java.time.chronoGeneric API for calendar systems other than the default ISO. java.time.formatProvides classes to print and parse dates and times. java.time.temporalAccess to date and time using fields and units, and date time adjusters. java.time.zoneSupport for time-zones and their rules. java.utilContains 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.concurrentUtility classes commonly useful in concurrent programming. java.util.concurrent.atomicA small toolkit of classes that support lock-free thread-safe programming on single variables. java.util.concurrent.locksInterfaces and classes providing a framework for locking and waiting for conditions that is distinct from built-in synchronization and monitors. java.util.functionFunctional interfaces provide target types for lambda expressions and method references. java.util.jarProvides 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.regexClasses for matching character sequences against patterns specified by regular expressions. java.util.spiService provider classes for the classes in the java.util package. java.util.streamClasses to support functional-style operations on streams of elements, such as map-reduce transformations on collections. java.util.zipProvides classes for reading and writing the standard ZIP and GZIP file formats. javax.cryptoProvides the classes and interfaces for cryptographic operations. javax.crypto.interfacesProvides interfaces for Diffie-Hellman keys as defined in RSA Laboratories' PKCS #3. javax.crypto.specProvides classes and interfaces for key specifications and algorithm parameter specifications. javax.netProvides classes for networking applications. javax.net.sslProvides classes for the secure socket package. javax.security.authThis package provides a framework for authentication and authorization. javax.security.auth.callbackThis 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.loginThis package provides a pluggable authentication framework. javax.security.auth.spiThis package provides the interface to be used for implementing pluggable authentication modules. javax.security.auth.x500This package contains the classes that should be used to store X500 Principal and X500 Private Credentials in a Subject. javax.security.certProvides classes for public key certificates.
Provides Type Description FileSystemProvider Uses Type Description AbstractChronologyAn abstract implementation of a calendar system, used to organize and identify dates. AsynchronousChannelProviderService-provider class for asynchronous channels. BreakIteratorProviderAn abstract class for service providers that provide concrete implementations of the
CalendarDataProviderAn abstract class for service providers that provide locale-dependent
CalendarNameProviderAn abstract class for service providers that provide localized string representations (display names) of
CharsetProviderCharset service-provider class. ChronologyA calendar system, used to organize and identify dates. CollatorProviderAn abstract class for service providers that provide concrete implementations of the
ContentHandlerFactoryThis interface defines a factory for content handlers. CurrencyNameProviderAn abstract class for service providers that provide localized currency symbols and display names for the
DateFormatProviderAn abstract class for service providers that provide concrete implementations of the
DateFormatSymbolsProviderAn abstract class for service providers that provide instances of the
DecimalFormatSymbolsProviderAn abstract class for service providers that provide instances of the
FileSystemProviderService-provider class for file systems. FileTypeDetectorA file type detector for probing a file to guess its file type. LocaleNameProviderAn abstract class for service providers that provide localized names for the
LoginModuleService-provider interface for authentication technology providers. NumberFormatProviderAn abstract class for service providers that provide concrete implementations of the
ProviderThis class represents a "provider" for the Java Security API, where a provider implements some or all parts of Java Security. ResourceBundleControlProviderAn interface for service providers that provide implementations of
ResourceBundleProvideris a service provider interface for resource bundles.
SelectorProviderService-provider class for selectors and selectable channels. System.LoggerFinderThe
LoggerFinderservice is responsible for creating, managing, and configuring loggers to the underlying framework it uses.
TimeZoneNameProviderAn abstract class for service providers that provide localized time zone names for the
ToolProviderAn interface for command-line tools to provide a way to be invoked without necessarily starting a new VM. URLStreamHandlerProviderURL stream handler service-provider class. ZoneRulesProviderProvider of time-zone rules to the system.