Java Platform, Standard Edition (Java SE) is a
computing platform
A computing platform or digital platform is an environment in which a piece of software is executed. It may be the hardware or the operating system (OS), even a web browser and associated application programming interfaces, or other underlying ...
for development and deployment of
portable code for
desktop and
server environments. Java SE was formerly known as Java 2 Platform, Standard Edition (J2SE).
The platform uses
Java
Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mo ...
programming language and is part of the
Java software-platform family. Java SE defines a range of general-purpose
APIs—such as
Java APIs for the
Java Class Library
The Java Class Library (JCL) is a set of Library (computer science)#Dynamic linking, dynamically loadable libraries that List of JVM languages, Java Virtual Machine (JVM) languages can call at Run time (program lifecycle phase), run time. Because ...
—and also includes the
Java Language Specification and the
Java Virtual Machine Specification.
OpenJDK is the official
reference implementation since version 7.
Nomenclature, standards and specifications
The platform was known as ''Java 2 Platform, Standard Edition'' or ''J2SE'' from version 1.2, until the name was changed to ''Java Platform, Standard Edition'' or ''Java SE'' in version 1.5. The "SE" is used to distinguish the base platform from the Enterprise Edition (
Java EE) and Micro Edition (
Java ME
Java Platform, Micro Edition or Java ME is a computing platform for development and deployment of portable code for embedded and mobile devices (micro-controllers, sensors, gateways, mobile phones, personal digital assistants, TV set-top ...
) platforms. The "2" was originally intended to emphasize the major changes introduced in version 1.2, but was removed in version 1.6. The naming convention has been changed several times over the
Java version history. Starting with J2SE 1.4 (Merlin), Java SE has been developed under the
Java Community Process, which produces descriptions of proposed and final specifications for the Java platform called
Java Specification Requests (JSR). JSR 59 was the umbrella specification for J2SE 1.4 and JSR 176 specified J2SE 5.0 (Tiger). Java SE 6 (Mustang) was released under JSR 270.
Java Platform, Enterprise Edition (Java EE) is a related specification that includes all the
classes in Java SE, plus a number that are more useful to programs that run on
servers as opposed to
workstation
A workstation is a special computer designed for technical or scientific applications. Intended primarily to be used by a single user, they are commonly connected to a local area network and run multi-user operating systems. The term ''worksta ...
s.
Java Platform, Micro Edition
Java Platform, Micro Edition or Java ME is a computing platform for development and deployment of portable code for embedded and mobile devices (micro-controllers, sensors, gateways, mobile phones, personal digital assistants, TV set-top ...
(Java ME) is a related specification intended to provide a certified collection of Java APIs for the development of software for small, resource-constrained devices such as
cell phones,
PDAs and
set-top box
A set-top box (STB), also colloquially known as a cable box and historically television decoder, is an information appliance device that generally contains a TV-tuner input and displays output to a television set and an external source of si ...
es.
The
Java Runtime Environment (JRE) and
Java Development Kit (JDK) are the actual files downloaded and installed on a computer to run or develop Java programs, respectively.
General purpose packages
java.lang
The
Java package contains fundamental classes and
interfaces closely tied to the language and
runtime system. This includes the root classes that form the
class hierarchy
A class hierarchy or inheritance tree in computer science is a classification of object types, denoting objects as the instantiations of classes (class is like a blueprint, the object is what is built from that blueprint) inter-relating the vario ...
, types tied to the language definition, basic
exceptions, math functions,
threading, security functions, as well as some information on the underlying native system. This package contains 22 of 32
Error
classes provided in JDK 6.
The main classes and interfaces in
java.lang
are:
* – the class that is the root of every class hierarchy.
* – the base class for
enumeration classes (as of J2SE 5.0).
* – the class that is the root of the Java
reflection system.
* – the class that is the base class of the exception class hierarchy.
* , , and – the base classes for each exception type.
* – the class that allows operations on threads.
* – the class for
strings and
string literals.
* and – classes for performing
string manipulation (
StringBuilder
as of J2SE 5.0).
* – the interface that allows generic comparison and ordering of objects (as of J2SE 1.2).
* – the interface that allows generic iteration using the
enhanced for
loop (as of J2SE 5.0).
* , , , , and – classes that provide "system operations" that manage the
dynamic loading of classes, creation of external
processes
A process is a series or set of activities that interact to produce a result; it may occur once-only or be recurrent or periodic.
Things called a process include:
Business and management
*Business process, activities that produce a specific se ...
, host environment inquiries such as the time of day, and enforcement of
security policies.
* and – classes that provide basic math functions such as
sine,
cosine, and
square root
In mathematics, a square root of a number is a number such that ; in other words, a number whose ''square'' (the result of multiplying the number by itself, or ⋅ ) is . For example, 4 and −4 are square roots of 16, because .
...
(
StrictMath
as of J2SE 1.3).
* The
primitive wrapper classes that
encapsulate primitive types as
objects.
* The basic exception classes thrown for language-level and other common exceptions.
Classes in
java.lang
are automatically imported into every
source file.
java.lang.ref
The package provides more flexible types of
references
Reference is a relationship between objects in which one object designates, or acts as a means by which to connect to or link to, another object. The first object in this relation is said to ''refer to'' the second object. It is called a '' name'' ...
than are otherwise available, permitting limited interaction between the application and the
Java Virtual Machine
A Java virtual machine (JVM) is a virtual machine that enables a computer to run Java programs as well as programs written in other languages that are also compiled to Java bytecode. The JVM is detailed by a specification that formally describ ...
(JVM)
garbage collector. It is an important package, central enough to the language for the language designers to give it a name that starts with "java.lang", but it is somewhat special-purpose and not used by a lot of developers. This package was added in J2SE 1.2.
Java has an expressive system of references and allows for special behavior for garbage collection. A normal reference in Java is known as a "strong reference." The
java.lang.ref
package defines three other types of references—soft,
weak
Weak may refer to:
Songs
* "Weak" (AJR song), 2016
* "Weak" (Melanie C song), 2011
* "Weak" (SWV song), 1993
* "Weak" (Skunk Anansie song), 1995
* "Weak", a song by Seether from '' Seether: 2002-2013''
Television episodes
* "Weak" (''Fear t ...
, and phantom references. Each type of reference is designed for a specific use.
* A can be used to implement a
cache. An object that is not reachable by a strong reference (that is, not strongly reachable), but is referenced by a soft reference is called "softly reachable." A softly reachable object may be garbage collected at the discretion of the garbage collector. This generally means that softly reachable objects are only garbage collected when free memory is low—but again, this is at the garbage collector's discretion. Semantically, a soft reference means, "Keep this object when nothing else references it, unless the memory is needed."
* A is used to implement weak maps. An object that is not strongly or softly reachable, but is referenced by a weak reference is called "
weakly reachable
In computer programming, unreachable memory is a block of dynamically allocated memory where the program that allocated the memory no longer has any reachable pointer that refers to it. Similarly, an unreachable object is a dynamically alloca ...
". A weakly reachable object is garbage collected in the next collection cycle. This behavior is used in the class . A weak map allows the programmer to put key/value pairs in the map and not worry about the objects taking up memory when the key is no longer reachable anywhere else. Another possible application of weak references is the
string intern pool. Semantically, a weak reference means "get rid of this object when nothing else references it at the next garbage collection."
* A is used to reference objects that have been marked for garbage collection and have been
finalized, but have not yet been reclaimed. An object that is not strongly, softly or weakly reachable, but is referenced by a phantom reference is called "phantom reachable." This allows for more flexible cleanup than is possible with the finalization mechanism alone. Semantically, a phantom reference means "this object is no longer needed and has been finalized in preparation for being collected."
Each of these reference types extends the class, which provides the
method to return a strong reference to the referent object (or
null
if the reference has been cleared or if the reference type is phantom), and the method to clear the reference.
The
java.lang.ref
also defines the class , which can be used in each of the applications discussed above to keep track of objects that have changed reference type. When a
Reference
is created it is optionally registered with a reference queue. The application polls the reference queue to get references that have changed reachability state.
java.lang.reflect
Reflection is a constituent of the
Java
Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mo ...
API that lets Java code examine and "reflect" on Java components at runtime and use the reflected members. Classes in the package, along with
java.lang.Class
and accommodate applications such as
debuggers,
interpreters
Interpreting is a translational activity in which one produces a first and final target-language output on the basis of a one-time exposure to an expression in a source language.
The most common two modes of interpreting are simultaneous interp ...
, object inspectors,
class browser
{{Unreferenced, date=July 2010
A class browser is a feature of an integrated development environment (IDE) that allows the programmer to browse, navigate, or visualize the structure of object-oriented programming code.
History
Most modern clas ...
s, and services such as object
serialization
In computing, serialization (or serialisation) is the process of translating a data structure or object state into a format that can be stored (e.g. files in secondary storage devices, data buffers in primary storage devices) or transmitted (e ...
and
JavaBeans
In computing based on the Java Platform, JavaBeans is a technology developed by Sun Microsystems and released in 1996, as part of JDK 1.1.
The 'beans' of JavaBeans are classes that encapsulate one or more objects into a single standardized obj ...
that need access to either the public members of a target object (based on its runtime class) or the members declared by a given class. This package was added in JDK 1.1.
Reflection is used to instantiate classes and invoke methods using their names, a concept that allows for dynamic programming. Classes, interfaces, methods,
fields, and
constructor
Constructor may refer to:
Science and technology
* Constructor (object-oriented programming), object-organizing method
* Constructors (Formula One), person or group who builds the chassis of a car in auto racing, especially Formula One
* Construc ...
s can all be discovered and used at runtime. Reflection is supported by
metadata that the JVM has about the program.
= Techniques
=
There are basic techniques involved in reflection:
* Discovery – this involves taking an object or class and discovering the members, superclasses, implemented interfaces, and then possibly using the discovered elements.
* Use by name – involves starting with the symbolic name of an element and using the named element.
Discovery
Discovery typically starts with an object and calling the method to get the object's
Class
. The
Class
object has several methods for discovering the contents of the class, for example:
* – returns an array of objects representing all the public methods of the class or interface
* – returns an array of objects representing all the public constructors of the class
* – returns an array of objects representing all the public fields of the class or interface
* – returns an array of
Class
objects representing all the public classes and interfaces that are members (e.g.
inner classes) of the class or interface
* – returns the
Class
object representing the superclass of the class or interface (
null
is returned for interfaces)
* – returns an array of
Class
objects representing all the interfaces that are implemented by the class or interface
Use by name
The
Class
object can be obtained either through discovery, by using the ''class literal'' (e.g.
MyClass.class
) or by using the name of the class (e.g. ). With a
Class
object, member
Method
,
Constructor
, or
Field
objects can be obtained using the symbolic name of the member. For example:
* – returns the
Method
object representing the public method with the name "methodName" of the class or interface that accepts the parameters specified by the
Class...
parameters.
* – returns the
Constructor
object representing the public constructor of the class that accepts the parameters specified by the
Class...
parameters.
* – returns the
Field
object representing the public field with the name "fieldName" of the class or interface.
Method
,
Constructor
, and
Field
objects can be used to dynamically access the represented member of the class. For example:
* – returns an
Object
containing the value of the field from the instance of the object passed to
get()
. (If the
Field
object represents a static field then the
Object
parameter is ignored and may be
null
.)
* – returns an
Object
containing the result of invoking the method for the instance of the first
Object
parameter passed to
invoke()
. The remaining
Object...
parameters are passed to the method. (If the
Method
object represents a
static method then the first
Object
parameter is ignored and may be
null
.)
* – returns the new
Object
instance from invoking the constructor. The
Object...
parameters are passed to the constructor. (Note that the parameterless constructor for a class can also be invoked by calling .)
= Arrays and proxies
=
The
java.lang.reflect
package also provides an class that contains static methods for creating and manipulating array objects, and since J2SE 1.3, a class that supports dynamic creation of proxy classes that implement specified interfaces.
The implementation of a
Proxy
class is provided by a supplied object that implements the interface. The
InvocationHandler
's method is called for each method invoked on the proxy object—the first parameter is the proxy object, the second parameter is the
Method
object representing the method from the interface implemented by the proxy, and the third parameter is the array of parameters passed to the interface method. The
invoke()
method returns an
Object
result that contains the result returned to the code that called the proxy interface method.
java.io
The package contains classes that support
input and output. The classes in the package are primarily
stream-oriented; however, a class for
random access files
File or filing may refer to:
Mechanical tools and processes
* File (tool), a tool used to ''remove'' fine amounts of material from a workpiece
**Filing (metalworking), a material removal process in manufacturing
** Nail file, a tool used to gent ...
is also provided. The central classes in the package are and , which are
abstract
Abstract may refer to:
* ''Abstract'' (album), 1962 album by Joe Harriott
* Abstract of title a summary of the documents affecting title to parcel of land
* Abstract (law), a summary of a legal document
* Abstract (summary), in academic publishi ...
base classes for reading from and writing to
byte streams, respectively. The related classes and are abstract base classes for reading from and writing to
character
Character or Characters may refer to:
Arts, entertainment, and media Literature
* ''Character'' (novel), a 1936 Dutch novel by Ferdinand Bordewijk
* ''Characters'' (Theophrastus), a classical Greek set of character sketches attributed to The ...
streams, respectively. The package also has a few miscellaneous classes to support interactions with the host
file system
In computing, file system or filesystem (often abbreviated to fs) is a method and data structure that the operating system uses to control how data is stored and retrieved. Without a file system, data placed in a storage medium would be one lar ...
.
Streams
The stream classes follow the
decorator pattern by extending the base subclass to add features to the stream classes. Subclasses of the base stream classes are typically named for one of the following attributes:
* the source/destination of the stream data
* the type of data written to/read from the stream
* additional processing or filtering performed on the stream data
The stream subclasses are named using the naming
pattern
A pattern is a regularity in the world, in human-made design, or in abstract ideas. As such, the elements of a pattern repeat in a predictable manner. A geometric pattern is a kind of pattern formed of geometric shapes and typically repeated li ...
''XxxStreamType''
where
''Xxx''
is the name describing the feature and
''StreamType''
is one of
InputStream
,
OutputStream
,
Reader
, or
Writer
.
The following table shows the sources/destinations supported directly by the
java.io
package:
Other standard library packages provide stream implementations for other destinations, such as the
InputStream
returned by the method or the Java EE class.
Data type handling and processing or filtering of stream data is accomplished through stream
filters
Filter, filtering or filters may refer to:
Science and technology
Computing
* Filter (higher-order function), in functional programming
* Filter (software), a computer program to process a data stream
* Filter (video), a software component th ...
. The filter classes all accept another compatible stream object as a parameter to the constructor and ''decorate'' the enclosed stream with additional features. Filters are created by extending one of the base filter classes , , , or .
The
Reader
and
Writer
classes are really just byte streams with additional processing performed on the data stream to convert the bytes to characters. They use the default
character encoding
Character encoding is the process of assigning numbers to graphical characters, especially the written characters of human language, allowing them to be stored, transmitted, and transformed using digital computers. The numerical values tha ...
for the platform, which as of J2SE 5.0 is represented by the returned by the static method. The class converts an
InputStream
to a
Reader
and the class converts an
OutputStream
to a
Writer
. Both these classes have constructors that support specifying the character encoding to use. If no encoding is specified, the program uses the default encoding for the platform.
The following table shows the other processes and filters that the
java.io
package directly supports. All these classes extend the corresponding
Filter
class.
Random access
The class supports ''
random access'' reading and writing of files. The class uses a ''
file pointer
The C programming language provides many standard library functions for file input and output. These functions make up the bulk of the C standard library header . The functionality descends from a "portable I/O package" written by Mike Lesk at ...
'' that represents a byte-offset within the file for the next read or write operation. The file pointer is moved implicitly by reading or writing and explicitly by calling the or methods. The current position of the file pointer is returned by the method.
File system
The class represents a
file or
directory path in a
file system
In computing, file system or filesystem (often abbreviated to fs) is a method and data structure that the operating system uses to control how data is stored and retrieved. Without a file system, data placed in a storage medium would be one lar ...
.
File
objects support the creation, deletion and renaming of files and directories and the manipulation of
file attribute File attributes are a type of meta-data that describe and may modify how files and/or directories in a filesystem behave. Typical file attributes may, for example, indicate or specify whether a file is visible, modifiable, compressed, or encrypte ...
s such as ''read-only'' and ''last modified timestamp''.
File
objects that represent directories can be used to get a list of all the contained files and directories.
The class is a
file descriptor
In Unix and Unix-like computer operating systems, a file descriptor (FD, less frequently fildes) is a process-unique identifier ( handle) for a file or other input/output resource, such as a pipe or network socket.
File descriptors typically ...
that represents a source or sink (destination) of bytes. Typically this is a file, but can also be a
console or
network socket.
FileDescriptor
objects are used to create
File
streams. They are obtained from
File
streams and
java.net
sockets and datagram sockets.
java.nio
In J2SE 1.4, the package (NIO or Non-blocking I/O) was added to support
memory-mapped I/O, facilitating
I/O operations closer to the underlying hardware with sometimes dramatically better performance. The
java.nio
package provides support for a number of buffer types. The subpackage provides support for different
character encoding
Character encoding is the process of assigning numbers to graphical characters, especially the written characters of human language, allowing them to be stored, transmitted, and transformed using digital computers. The numerical values tha ...
s for character data. The subpackage provides support for ''channels,'' which represent connections to entities that are capable of performing I/O operations, such as files and sockets. The
java.nio.channels
package also provides support for fine-grained locking of files.
java.math
The package supports
multiprecision arithmetic
In computer science, arbitrary-precision arithmetic, also called bignum arithmetic, multiple-precision arithmetic, or sometimes infinite-precision arithmetic, indicates that calculations are performed on numbers whose digits of precision are lim ...
(including modular arithmetic operations) and provides multiprecision prime number generators used for cryptographic key generation. The main classes of the package are:
* – provides arbitrary-precision signed decimal numbers.
BigDecimal
gives the user control over rounding behavior through
RoundingMode
.
* – provides arbitrary-precision integers. Operations on
BigInteger
do not
overflow or lose precision. In addition to standard arithmetic operations, it provides
modular arithmetic
In mathematics, modular arithmetic is a system of arithmetic for integers, where numbers "wrap around" when reaching a certain value, called the modulus. The modern approach to modular arithmetic was developed by Carl Friedrich Gauss in his bo ...
,
GCD calculation,
primality testing
A primality test is an algorithm for determining whether an input number is prime. Among other fields of mathematics, it is used for cryptography. Unlike integer factorization, primality tests do not generally give prime factors, only stating wheth ...
,
prime number
A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only way ...
generation,
bit
The bit is the most basic unit of information in computing and digital communications. The name is a portmanteau of binary digit. The bit represents a logical state with one of two possible values. These values are most commonly represented a ...
manipulation, and other miscellaneous operations.
* – encapsulate the context settings that describe certain rules for numerical operators.
* – an enumeration that provides eight rounding behaviors.
java.net
The package provides special IO routines for networks, allowing
HTTP
The Hypertext Transfer Protocol (HTTP) is an application layer protocol in the Internet protocol suite model for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web, ...
requests, as well as other common transactions.
java.text
The package implements parsing routines for strings and supports various human-readable languages and locale-specific parsing.
java.util
Data structure
In computer science, a data structure is a data organization, management, and storage format that is usually chosen for Efficiency, efficient Data access, access to data. More precisely, a data structure is a collection of data values, the rel ...
s that aggregate objects are the focus of the package. Included in the package is the
Collections API
The Java collections framework is a set of classes and interfaces that implement commonly reusable collection data structures.
Although referred to as a framework, it works in a manner of a library. The collections framework provides both int ...
, an organized data structure hierarchy influenced heavily by the
design patterns considerations.
Special purpose packages
java.applet
Created to support
Java applet
Java applets were small applications written in the Java programming language, or another programming language that compiles to Java bytecode, and delivered to users in the form of Java bytecode. The user launched the Java applet from a ...
creation, the package lets applications be downloaded over a network and run within a guarded sandbox. Security restrictions are easily imposed on the sandbox. A developer, for example, may apply a
digital signature
A digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. A valid digital signature, where the prerequisites are satisfied, gives a recipient very high confidence that the message was created b ...
to an applet, thereby labeling it as safe. Doing so allows the user to grant the applet permission to perform restricted operations (such as accessing the local hard drive), and removes some or all the sandbox restrictions. Digital certificates are issued by
certificate authorities
In cryptography, a certificate authority or certification authority (CA) is an entity that stores, signs, and issues digital certificates. A digital certificate certifies the ownership of a public key by the named subject of the certificate. This ...
.
java.beans
Included in the package are various classes for developing and manipulating beans, reusable components defined by the
JavaBeans architecture. The architecture provides mechanisms for manipulating properties of components and firing events when those properties change.
The APIs in
java.beans
are intended for use by a bean editing tool, in which beans can be combined, customized, and manipulated. One type of bean editor is a
GUI designer in an
integrated development environment
An integrated development environment (IDE) is a software application that provides comprehensive facilities to computer programmers for software development. An IDE normally consists of at least a source code editor, build automation tools a ...
.
java.awt
The , or Abstract Window Toolkit, provides access to a basic set of
GUI widgets based on the underlying native platform's widget set, the core of the GUI event subsystem, and the interface between the native windowing system and the Java application. It also provides several basic
layout managers, a datatransfer package for use with the
Clipboard and
Drag and Drop, the interface to
input device
In computing, an input device is a piece of equipment used to provide data and control signals to an information processing system, such as a computer or information appliance. Examples of input devices include keyboards, mouse, scanners, cameras ...
s such as
mice and
keyboards, as well as access to the
system tray on supporting systems. This package, along with
javax.swing
contains the largest number of enums (7 in all) in JDK 6.
java.rmi
The package provides
Java remote method invocation to support
remote procedure calls between two java applications running in different
JVMs.
java.security
Support for security, including the message digest algorithm, is included in the package.
java.sql
An implementation of the
JDBC API (used to access
SQL database
In computing, a database is an organized collection of data stored and accessed electronically. Small databases can be stored on a file system, while large databases are hosted on computer clusters or cloud storage. The design of databases spa ...
s) is grouped into the package.
javax.rmi
The
javax.rmi
/code> package provided support for the remote communication between applications, using the RMI over IIOP protocol. This protocol combines RMI and CORBA features.
Java SE Core Technologies - CORBA / RMI-IIOP
javax.swing
Swing
Swing or swinging may refer to:
Apparatus
* Swing (seat), a hanging seat that swings back and forth
* Pendulum, an object that swings
* Russian swing, a swing-like circus apparatus
* Sex swing, a type of harness for sexual intercourse
* Swing rid ...
is a collection of routines that build on java.awt
to provide a platform independent widget toolkit
A widget toolkit, widget library, GUI toolkit, or UX library is a library or a collection of libraries containing a set of graphical control elements (called ''widgets'') used to construct the graphical user interface (GUI) of programs.
Most wid ...
. uses the 2D drawing routines to render the user interface components instead of relying on the underlying native operating system
An operating system (OS) is system software that manages computer hardware, software resources, and provides common daemon (computing), services for computer programs.
Time-sharing operating systems scheduler (computing), schedule tasks for ef ...
GUI support.
This package contains the largest number of classes (133 in all) in JDK 6. This package, along with java.awt
also contains the largest number of enums (7 in all) in JDK 6. It supports pluggable looks and feels (PLAFs) so that widgets in the GUI can imitate those from the underlying native system. Design patterns permeate the system, especially a modification of the model–view–controller
Model–view–controller (MVC) is a software architectural pattern commonly used for developing user interfaces that divide the related program logic into three interconnected elements. This is done to separate internal representations of infor ...
pattern, which loosens the coupling between function and appearance. One inconsistency is that (as of J2SE 1.3) fonts are drawn by the underlying native system, and not by Java, limiting text portability. Workarounds, such as using bitmap fonts, do exist. In general, "layouts" are used and keep elements within an aesthetically consistent GUI across platforms.
javax.swing.text.html.parser
The package provides the error tolerant HTML parser that is used for writing various web browsers and web bots.
javax.xml.bind.annotation
The javax.xml.bind.annotation
/code> package contained the largest number of Annotation Types (30 in all) in JDK 6. It defines annotations for customizing Java program elements to XML Schema mapping.
OMG packages
org.omg.CORBA
The
/code> package provided support for the remote communication between applications using the General Inter-ORB Protocol and supports other features of the common object request broker architecture. Same as RMI
RMI may refer to:
Science and technology
* Radio-magnetic indicator, an instrument used in aircraft navigation
* Repetitive motion injury, an injury to the musculoskeletal and nervous systems
* Richtmyer–Meshkov instability, an instability occu ...
and RMI-IIOP RMI-IIOP (read as "RMI over IIOP") denotes the Java Remote Method Invocation (RMI) interface over the Internet Inter-Orb Protocol (IIOP), which delivers Common Object Request Broker Architecture (CORBA) distributed computing capabilities to the Ja ...
, this package is for calling remote methods of objects on other virtual machines (usually via network).
This package contained the largest number of Exception
classes (45 in all) in JDK 6. From all communication possibilities CORBA is portable between various languages; however, with this comes more complexity.
These packages were deprecated in Java 9 and removed from Java 11.
org.omg.PortableInterceptor
The org.omg.PortableInterceptor
/code> package contained the largest number of interfaces (39 in all) in JDK 6. It provides a mechanism to register ORB hooks through which ORB services intercept the normal flow of execution of the ORB.
Security
Several critical security vulnerabilities have been reported. Security alerts from Oracle announce critical security-related patches to Java SE.
References
External links
*
JSR 270
(Java SE 6)
1.8
1.7
1.6
{{Java (software platform)
Computing platforms
Platform, Standard Edition
Platform, Standard Edition