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- An object that identifies an enterprise bean. A client can serialize the handle and then later deserialize it to obtain a reference to the enterprise bean.
- Browse Related Terms: abstract schema name, activation, actor, bean-managed transaction, business logic, business method, caller principal, create method, EJB, EJB context, EJB home object, EJB module, EJB object, finder method, handle, message-driven bean, method permission, Passivation, remote interface, remove method, transaction attribute
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The physical devices of a computer system, such as its micro-chips, disk drives, keyboard, printer, sound card, and so on. It is called `hardware' in contrast to programs, which are called `software'.
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See aggregation.
- Browse Related Terms: abstract, aggregation, class inheritance, has-a relationship, Hash Function, hierarchy, implements clause, inheritance, inheritance hierarchy, interface inheritance, is-a relationship, multiple inheritance, sibling sub classes, single inheritance, sub class, Super, upcast
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A value returned by a hash function. A hash code can be used as an index into a random-access data structure, providing an efficient mapping between an object and its location. Used by classes such as
HashMap.- Browse Related Terms: filter stream, hash code, Reader class, stream class, Writer class
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A function used to produce a hash code from the arbitrary contents of an object. Classes can override the
hashValuemethod, inherited from theObjectclass, to define their own hash function.- Browse Related Terms: abstract, aggregation, class inheritance, has-a relationship, Hash Function, hierarchy, implements clause, inheritance, inheritance hierarchy, interface inheritance, is-a relationship, multiple inheritance, sibling sub classes, single inheritance, sub class, Super, upcast
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A collection of objects with different dynamic types. See homogeneous collection.
- Browse Related Terms: array, base type, deep copy, dynamic type, finalization, garbage collection, heterogeneous collection, homogeneous collection, shallow copy, subarray
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Number representation in base 16. In base 16, the digits
0to9and the lettersAtoFare used.Arepresents 10 (base 10),Brepresents 11 (base 10), and so on. Digit positions represent successive powers of 16.The numbering system that uses 16 as its base. The marks 0-9 and a-f (or equivalently A-F) represent the digits 0 through 15. In programs written in the Java programming language, hexadecimal numbers must be preceded with 0x. See also octal.
- Browse Related Terms: binary, decimal, hexadecimal, JAR, Modem, Modulation, octal, sound card
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A classification of relationships in which each item except the top one (known as the root) is a specialized form of the item above it. Each item can have one or more items below it in the hierarchy. In the Java class hierarchy, the root is the
Objectclass.- Browse Related Terms: abstract, aggregation, class inheritance, has-a relationship, Hash Function, hierarchy, implements clause, inheritance, inheritance hierarchy, interface inheritance, is-a relationship, multiple inheritance, sibling sub classes, single inheritance, sub class, Super, upcast
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Languages such as Java, C++, Ada, etc. which provide programmers with features such as control structures, methods, classes, packages, etc. These features are largely independent of any particular instruction set, and hence programs written in these languages tend to be more portable than those written in low level programming languages.
- Browse Related Terms: global variable, high level programming language, identifier, native method, object-oriented language, stepwise refinement, structured programming, transient
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The Home Location Register (HLR) is a database for permanent storage of subscriber data and service profiles.
- Browse Related Terms: Delegation, destination, durable subscription, HLR (Home Location Register), impersonation, publish/subscribe messaging system, topic, VLR (Visitor Location Register)
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- An object that can be used to obtain a reference to the home interface. A home handle can be serialized and written to stable storage and deserialized to obtain the reference.
- Browse Related Terms: applet, applet container, Application, home handle, IDL, iterator pattern, trusted applet
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- One of two interfaces for an enterprise bean. The home interface defines zero or more methods for managing an enterprise bean. The home interface of a session bean defines
createandremovemethods, whereas the home interface of an entity bean definescreate, finder, andremovemethods. - Browse Related Terms: abstract schema, bean-managed persistence, cascade delete, container-managed persistence, conversational state, enterprise bean, Enterprise JavaBeans Query Language (EJB QL), entity bean, home interface, persistence, persistent field, primary key, reentrant entity bean, relationship field, stateful session bean, stateless session bean
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A collection of objects with the same dynamic type. Arrays are the most common homogeneous collection objects. See heterogeneous collection.
- Browse Related Terms: array, base type, deep copy, dynamic type, finalization, garbage collection, heterogeneous collection, homogeneous collection, shallow copy, subarray
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A computer system on which a process is run.
- Browse Related Terms: address space, archiving, compositing, deployment, distributed, double buffering, host system, interprocess communication, micro-chip, normalization, North American Industry Classification System (NAICS), object serialization, preverification, Random Access Memory, timesharing system, virtual memory
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The name of a host system.
- Browse Related Terms: hostname, JSP container, JSP container, distributed, Security Policy, servlet container, distributed, virtual host, Web application, distributable, Web container, distributed, Web server
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An area in an image map with a particular significance. A program typically monitors movements of the mouse, and responds according to the actions associated with the hot spots over which it passes. This might include displaying different status information, for instance. Often, clicking the mouse on a hot spot is used to indicate that the program should activate an associated action. The term hot spot is also used to signify a computationally intensive part of a program, such as an inner loop. Such places are often a potential target for program optimization.
- Browse Related Terms: bounded repetition, Condition, continue statement, control structure, do, do loop, FOR, for loop, hot spot, if statement, if-else statement, infinite loop, iteration, loop variable, repetition, statement, Toggle, unbounded repetition, while, while loop
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A color model based upon representing a color as three components: hue, saturation and brightness. This is sometimes known as the HSV color model - hue, saturation and value. See RGB Color Model.
- Browse Related Terms: bean, HSB Color Model, JavaBeans, layout manager, life cycle (JavaServer Faces), module, Pipe, radio buttons, RGB Color Model, service element, shortcut key
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HyperText Markup Language. This is a file format, based on SGML, for hypertext documents on the Internet. It is very simple and allows for the embedding of images, sounds, video streams, form fields and simple text formatting. References to other objects are embedded using URLs.
- Hypertext Markup Language. A markup language for hypertext documents on the Internet. HTML enables the embedding of images, sounds, video streams, form fields, references to other objects with URLs, and basic text formatting.
- Browse Related Terms: HTML, ISO 3166, key value, MIME, Parsing, RDF schema, SGML, SQL, Universal Standard Products and Services Classification (UNSPSC), XSL
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- Hypertext Transfer Protocol. The Internet protocol used to retrieve hypertext objects from remote hosts. HTTP messages consist of requests from client to server and responses from server to client.
HyperText Transfer Protocol. The Internet protocol, based on TCP/IP, used to fetch hypertext objects from remote hosts. See also TCP/IP.
- Browse Related Terms: File Transfer Protocol, FTP, HTTP, HTTP (HyperText Transfer Protocol), HTTPS, HTTPS (Hyper Text Transfer Protocol Secure sockets), IIOP, Java Secure Socket Extension (JSSE), ORB, scheme, Secure Socket Layer (SSL), SOAP (Simple Object Access Protocol), well-known port
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The HyperText Transfer Protocol (HTTP) is a set of rules defined to enable a Web client (browser) to interact with a Web server.
- Browse Related Terms: File Transfer Protocol, FTP, HTTP, HTTP (HyperText Transfer Protocol), HTTPS, HTTPS (Hyper Text Transfer Protocol Secure sockets), IIOP, Java Secure Socket Extension (JSSE), ORB, scheme, Secure Socket Layer (SSL), SOAP (Simple Object Access Protocol), well-known port
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