JAVA
JAVA
- 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
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