Feature: This page acts as a switchboard to Java Documentation
and Help resources at theOpenSourcery and other Java resource sites. As well
we use colors to help categorize the layers of Java statements, commands
and APIs as follows:
| Java Reserved Keywords |
| abstract |
indicates a template class or method that must be inherited
to be created |
| assert |
debugging aid assert acct != null throws
an AssertionError when false |
| boolean |
basic logic datatype , Boolean is Object
equivalent |
| break |
part of while, for, switch statements,
transfers control out of loop/switch |
| byte |
basic numeric datatype, Double is Object equivalent |
| case |
switch option that is to be
matched for uderlyingstatements to be executed |
| catch |
Exception handling block of statement of try statement |
| char |
basic numeric datatype, ranging from -127 to 128, 8bit signed integer |
| class |
defines a particular object with its own methods and values |
| const |
reserved but not used |
| continue |
part of while, for, switch statements,
transfers control to end of loop |
| default |
switch statement case that all non-matching values goto |
| do |
part of the while statement with condition
at end of loop |
| double |
basic numeric datatype, 8byte floating point number |
| else |
|
| enum |
enumeration data structure as basic type |
| extends |
defines the super class that a sub class derives from |
| false |
boolean literal value - false |
| final |
modifier limits a member, method or class such that they cannot be
changed |
| finally |
block ofcode in try that executes after all catch exceptions
for clean up |
| float |
basic numeric datatype, 8byte floating point number |
| for |
loop statement used for enumeration and iterations through data structures |
| goto |
reserved but not used |
| if |
basic conditional logic statement |
| implements |
lists the interfaces to be implemented by a class |
| import |
references external packages and classes to be used in a class |
| instanceof |
boolean test whether first object is assignable to second |
| int |
basic numeric datatype, ranging from +-2147483648, 32bit signed integer |
| interface |
a class-like structure that declare attributes and methods; but must
be implemented by other class similar to abstract class |
| long |
basic numeric datatype, +-9223372036854775808, 64bit signed integer |
| native |
modifier that identifies methods developed in other languages like
C/C++ |
| new |
identifies declaration of new instance of class or member |
| null |
sets object reference to uninitialized; previous object is garbage
collectible |
| package |
a named collection of classes |
| private |
modifier that restricts access to class methods and attributes to
instances |
| protected |
modifier that restricts access to class methods and attributes to
packages |
| public |
modifier that allows any access to class methods and attributes/variables |
| return |
what value a function or method returns on completion |
| short |
basic numeric datatype, ranging from +-32768, 16bit signed
integer |
| static |
makes methods and attributes/variables apply across all instances
of class |
| strictfp |
modifier specifies a standard level of floating point precision
on all hardware |
| super |
modifier like this but refers to the base class variable/member |
| switch |
statement that routes control based on value of switch expression |
| synchronized |
modifier that ensures exclusive access to an object for a block of
statements |
| this |
used in constructors and methods to refer to the current object |
| throw |
causes an exception to be passed to the call stack |
| throws |
specifies the exceptions a method can throw |
| transient |
specifies that a data member/variable cannot be serialized |
| true |
boolean literal value |
| try |
key statement enclosure for monitoring exceptions in a block of code |
| void |
specifies a class method returns no value |
| volatile |
used to mark variables in methods that can be modified
by different threads |
| while |
looping statement that depnds on continuing true state of conditional |
|
Java 2 Platform Packages (go
here for complete listing) |
| java.applet |
Provides the classes necessary to create an applet and the classes an applet
uses to communicate with its applet context. |
| java.awt |
Contains all of the classes for creating user
interfaces and for painting graphics and images. |
| java.awt.color |
Provides classes for color spaces. |
| java.awt.datatransfer |
Provides interfaces and classes for transferring data
between and within applications. |
| java.awt.dnd |
Drag and Drop is a direct manipulation gesture found in many Graphical
User Interface systems that provides a mechanism to transfer
information between two entities logically associated with presentation
elements in the GUI. |
| java.awt.event |
Provides interfaces and classes for dealing with different
types of events fired by AWT components. |
| java.awt.font |
Provides classes and interface relating to fonts. |
| java.awt.geom |
Provides the Java 2D classes for defining and performing operations
on objects related to two-dimensional geometry. |
| java.awt.im |
Provides classes and interfaces for the input method framework. |
| java.awt.im.spi |
Provides interfaces that enable the development of input methods
that can be used with any Java runtime environment. |
| java.awt.image |
Provides classes for creating and modifying images. |
| java.awt.image.renderable |
Provides classes and interfaces for producing
rendering-independent images. |
| java.awt.print |
Provides classes and interfaces for a general printing API. |
| java.beans |
Contains classes related to developing
beans -- components
based on the JavaBeansTM architecture. |
| java.beans.beancontext |
Provides classes and interfaces relating to bean context. |
| 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.instrument |
Provides services that allow Java programming language agents to instrument programs running on the JVM. |
| java.lang.management |
Provides the management interface for monitoring and management of the
Java virtual machine as well as the operating system on which the
Java virtual machine is running. |
| 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.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 |
Service-provider classes for the java.nio.channels package. |
| java.nio.charset |
Defines charsets, decoders, and encoders, for translating between bytes and
Unicode characters. |
| java.nio.charset.spi |
Service-provider classes for the java.nio.charset package. |
| java.rmi |
Provides the RMI package. |
| java.rmi.activation |
Provides support for RMI Object Activation. |
| java.rmi.dgc |
Provides classes and interface for RMI distributed
garbage-collection (DGC). |
| java.rmi.registry |
Provides a class and two interfaces for the RMI registry. |
| java.rmi.server |
Provides classes and interfaces for supporting the server
side of RMI. |
| java.security |
Provides the classes and interfaces for the security framework. |
| java.security.acl |
The classes and interfaces in this package have been
superseded by classes in the java.security package. |
| 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.sql |
Provides the API for accessing and processing data stored in a
data source (usually a relational database) using the
JavaTM programming language. |
| java.text |
Provides classes and interfaces for handling text, dates, numbers, and messages
in a manner independent of natural languages. |
| java.util |
Contains the collections framework, legacy collection classes, event model,
date and time facilities, internationalization, and miscellaneous utility
classes (a string tokenizer, a random-number generator, and a bit array). |
| 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.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.logging |
Provides the classes and interfaces of
the JavaTM 2
platform's core logging facilities. |
| java.util.prefs |
This package allows applications to store and retrieve user and system
preference and configuration data. |
| java.util.regex |
Classes for matching character sequences against patterns specified by regular
expressions. |
| java.util.zip |
Provides classes for reading and writing the standard ZIP and GZIP
file formats. |
| javax.accessibility |
Defines a contract between user-interface components and an assistive technology
that provides access to those components. |
| 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.imageio |
The main package of the Java Image I/O API. |
| javax.imageio.event |
A package of the Java Image I/O API dealing with synchronous
notification of events during the reading and writing of images. |
| javax.imageio.metadata |
A package of the Java Image I/O API dealing with reading and writing
metadata. |
| javax.imageio.plugins.bmp |
Package containing the public classes used by the built-in BMP plug-in. |
| javax.imageio.plugins.jpeg |
Classes supporting the built-in JPEG plug-in. |
| javax.imageio.spi |
A package of the Java Image I/O API containing the plug-in interfaces
for readers, writers, transcoders, and streams, and a runtime
registry. |
| javax.imageio.stream |
A package of the Java Image I/O API dealing with low-level I/O from
files and streams. |
| javax.management |
Provides the core classes for the Java Management Extensions. |
| javax.management.loading |
Provides the classes which implement advanced dynamic
loading. |
| javax.management.modelmbean |
Provides the definition of the ModelMBean classes. |
| javax.management.monitor |
Provides the definition of the monitor classes. |
| javax.management.openmbean |
Provides the open data types and Open MBean descriptor classes. |
| javax.management.relation |
Provides the definition of the Relation Service. |
| javax.management.remote |
Interfaces for remote access to
JMX MBean servers. |
| javax.management.remote.rmi |
The RMI connector is a connector for the JMX Remote API that
uses RMI to transmit client requests to a remote MBean server. |
| javax.management.timer |
Provides the definition of the Timer MBean. |
| javax.naming |
Provides the classes and interfaces for accessing naming services. |
| javax.naming.directory |
Extends the javax.naming package to provide functionality
for accessing directory services. |
| javax.naming.event |
Provides support for event notification when accessing naming and
directory services. |
| javax.naming.ldap |
Provides support for LDAPv3 extended operations and controls. |
| javax.naming.spi |
Provides the means for dynamically plugging in support for accessing
naming and directory services through the javax.naming
and related packages. |
| javax.net |
Provides classes for networking applications. |
| javax.net.ssl |
Provides classes for the secure socket package. |
| javax.print |
Provides the principal classes and interfaces for the
JavaTM Print Service API. |
| javax.print.attribute |
Provides classes and interfaces
that describe the types of JavaTM Print
Service attributes and how they can be collected into attribute sets. |
| javax.print.attribute.standard |
Package javax.print.attribute.standard
contains classes for specific printing attributes. |
| javax.print.event |
Package javax.print.event contains event classes and listener interfaces. |
| javax.rmi |
Contains user APIs for RMI-IIOP. |
| javax.rmi.CORBA |
Contains portability APIs for RMI-IIOP. |
| javax.rmi.ssl |
Provides implementations of RMIClientSocketFactory
and RMIServerSocketFactory over
the Secure Sockets Layer (SSL) or Transport Layer Security (TLS) protocols. |
| 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.kerberos |
This package contains utility classes related to the Kerberos network
authentication protocol. |
| 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 Crendentials in a
Subject. |
| javax.security.cert |
Provides classes for public key certificates. |
| javax.security.sasl |
Contains class and interfaces for supporting SASL. |
| javax.sound.midi |
Provides interfaces and classes for I/O, sequencing, and synthesis of MIDI
(Musical Instrument Digital Interface) data. |
| javax.sound.midi.spi |
Supplies interfaces for service providers to implement when
offering new MIDI devices, MIDI file readers and writers, or sound bank readers. |
| javax.sound.sampled |
Provides interfaces and classes for capture, processing, and playback of sampled audio data. |
| javax.sound.sampled.spi |
Supplies abstract classes for service providers to subclass when
offering new audio devices, sound file readers and writers, or audio format converters. |
| javax.sql |
Provides the API for server side data source access and processing from
the JavaTM programming language. |
| javax.sql.rowset |
Standard interfaces and base classes for JDBC RowSet
implementations. |
| javax.sql.rowset.serial |
Provides utility classes to allow serializable mappings between SQL types
and data types in the Java programming language. |
| javax.sql.rowset.spi |
The standard classes and interfaces that a third party vendor has to
use in its implementation of a synchronization provider. |
| javax.swing |
Provides a set of "lightweight"
(all-Java language) components that,
to the maximum degree possible, work the same on all platforms. |
| javax.swing.border |
Provides classes and interface for drawing
specialized borders around a Swing component. |
| javax.swing.colorchooser |
Contains classes and interfaces used by the JColorChooser
component. |
| javax.swing.event |
Provides for events fired by Swing components. |
| javax.swing.filechooser |
Contains classes and interfaces used by the JFileChooser component. |
| javax.swing.plaf |
Provides one interface and many abstract classes that
Swing uses to provide its pluggable look-and-feel capabilities. |
| javax.swing.plaf.basic |
Provides user interface objects built according to the
Basic look and feel. |
| javax.swing.plaf.metal |
Provides user interface objects built according to
the Java look and feel (once codenamed Metal),
which is the default look and feel. |
| javax.swing.plaf.multi |
Provides user interface objects that combine two or more look and feels. |
| javax.swing.plaf.synth |
Synth is a skinnable look and feel in which all painting is
delegated. |
| javax.swing.table |
Provides classes and interfaces for dealing with
javax.swing.JTable. |
| javax.swing.text |
Provides classes and interfaces that deal with editable
and noneditable text components. |
| javax.swing.text.html |
Provides the class HTMLEditorKit and supporting classes
for creating HTML text editors. |
| javax.swing.text.html.parser |
Provides the default HTML parser, along with support classes. |
| javax.swing.text.rtf |
Provides a class (RTFEditorKit) for creating Rich-Text-Format
text editors. |
| javax.swing.tree |
Provides classes and interfaces for dealing with
javax.swing.JTree. |
| javax.swing.undo |
Allows developers to provide support for undo/redo
in applications such as text editors. |
| javax.transaction |
Contains three exceptions thrown by the ORB machinery during unmarshalling. |
| javax.transaction.xa |
Provides the API that defines the contract between the transaction
manager and the resource manager, which allows the transaction
manager to enlist and delist resource objects (supplied by the
resource manager driver) in JTA transactions. |
| javax.xml |
Defines core XML constants and functionality from the XML specifications. |
| javax.xml.datatype |
XML/Java Type Mappings. |
| javax.xml.namespace |
XML Namespace processing. |
| javax.xml.parsers |
Provides classes allowing the processing of XML documents. |
| javax.xml.transform |
This package defines the generic APIs for processing transformation
instructions, and performing a transformation from source to result. |
| javax.xml.transform.dom |
This package implements DOM-specific transformation APIs. |
| javax.xml.transform.sax |
This package implements SAX2-specific transformation APIs. |
| javax.xml.transform.stream |
This package implements stream- and URI- specific transformation APIs. |
| javax.xml.validation |
This package provides an API for validation of XML documents. |
| javax.xml.xpath |
This package provides an object-model neutral API for the
evaluation of XPath expressions and access to the evaluation
environment. |
| org.ietf.jgss |
This package presents a framework that allows application developers to
make use of security services like authentication, data integrity and
data confidentiality from a variety of underlying security mechanisms
like Kerberos, using a unified API. |
| org.omg.CORBA |
Provides the mapping of the OMG CORBA APIs to the JavaTM
programming language, including the class ORB, which is implemented
so that a programmer can use it as a fully-functional Object Request Broker
(ORB). |
| org.omg.CORBA_2_3 |
The CORBA_2_3 package defines additions to existing CORBA interfaces
in the Java 2 Standard Edition. These changes occurred in recent
revisions to the CORBA API defined by the OMG. The new methods were
added to interfaces derived from the corresponding interfaces in
the CORBA package. This provides backward compatibility and avoids
breaking the JCK tests. |
| org.omg.CORBA_2_3.portable |
Provides methods for the input and output of value types, and contains
other updates to the org/omg/CORBA/portable package. |
| org.omg.CORBA.DynAnyPackage |
Provides the exceptions used with the DynAny interface
(InvalidValue,
Invalid, InvalidSeq, and
TypeMismatch). |
| org.omg.CORBA.ORBPackage |
Provides the exception InvalidName, which is thrown
by the method ORB.resolve_initial_references
and the exception InconsistentTypeCode, which is thrown
by the Dynamic Any creation methods in the ORB class. |
| org.omg.CORBA.portable |
Provides a portability layer, that is, a set of ORB APIs
that makes it possible for code generated
by one vendor to run on another vendor's ORB. |
| org.omg.CosNaming |
Provides a naming service for Java IDL. |
| org.omg.Dynamic |
This package contains the Dynamic module specified in the OMG Portable
Interceptor specification,
http://cgi.omg.org/cgi-bin/doc?ptc/2000-08-06, section 21.9. |
| org.omg.DynamicAny |
Provides classes and interfaces that enable traversal of the data value
associated with an any at
runtime, and extraction of the primitive constituents of the data value. |
| org.omg.IOP |
This package contains the IOP module specified in the OMG document
The Common
Object Request Broker: Architecture and Specification,
http://cgi.omg.org/cgi-bin/doc?formal/99-10-07, section 13.6. |
| org.omg.Messaging |
This package contains the Messaging module specified in the OMG CORBA
Messaging specification,
http://cgi.omg.org/cgi-bin/doc?formal/99-10-07. |
| org.omg.PortableInterceptor |
Provides a mechanism to register ORB hooks through which ORB services
can intercept the normal flow of execution of the ORB. |
| org.omg.PortableServer |
Provides classes and interfaces for making the server side of your applications
portable across multivendor ORBs. |
| org.omg.SendingContext |
Provides support for the marshalling of value types. |
| org.omg.stub.java.rmi |
Contains RMI-IIOP Stubs for the Remote types that occur in the
java.rmi package. |
| org.w3c.dom |
Provides the interfaces for the Document Object Model (DOM) which is a
component API of the Java API for XML
Processing. |
| org.xml.sax |
This package provides the core SAX APIs. |
| org.xml.sax.ext |
This package contains interfaces to SAX2 facilities that
conformant SAX drivers won't necessarily support. |
| org.xml.sax.helpers |
This package contains "helper" classes, including
support for bootstrapping SAX-based applications. |