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Java is a computer programming language created by Sun Microsystems.
Java is used mainly on the Internet and uses a virtual machine which
has been implemented in most browsers to translate Java into a specific
application on different computer system. With most programming
languages, you either compile or interpret a program so that you
can run it on your computer. The Java programming language is unusual
in that a program is both compiled and interpreted. The most common
Java programs are applications and applets. Applications are standalone
programs, such as the HotJava browser. Applets are similar to applications,
but they don't run standalone. Instead, applets adhere to a set
of conventions that lets them run within a Java-compatible browser.
The Java programming language is a high-level language that can
be described as,
- Architecture neutral
- Object oriented
- Portable
- Distributed
- High performance
- Multithreaded
- Dynamic
- Secure
As long as a computer has a Java VM (Virtual Machine), a Java program
can run on these machines,
- Windows 2000
- Linux
- Solaris
- MacOS
The Java platform differs from most other platforms in that it's
a software-only platform that runs on top of other hardware-based
platforms. The Java platform has two components,
- The Java Virtual Machine (Java VM)
-compiles and translates Java scripts into Java bytecodes which
can be descibed as machine code instructions.
- The Java Application Programming Interface (Java API)
- is a large collection of ready-made software components that
provide many useful capabilities, such as graphical user interface
(GUI) widgets. The Java API is grouped into libraries of related
classes and interfaces; these libraries are known as packages.
Java can offer these features,
- Objects - object-oriented technology
- strings
- threads, numbers
- input and output
- data structures
- system properties
- date and time
- Applets
- 2D and 3D graphics
- telephony
- speech
- animation
- electronic signatures
- private key management
- access control
Java FAQ
Java Problems
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