Java Environment - Web Development and Design | Tutorial for Java, PHP, HTML, Javascript Java Environment - Web Development and Design | Tutorial for Java, PHP, HTML, Javascript

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Saturday, March 9, 2019

Java Environment

Java Environment


Development tools-part of java development kit (JDK).

Classes and methods-part of Java Standard Library (JSL), also 
known as Application Programming Interface (API).
JDK:



Appletviewer ( for viewing applets)

Javac (Compiler)

Java (Interpreter)

Javap (Java disassembler)

Javah (for C header files)

Javadoc ( for creating HTML description)

Jdb (Java Debugger)

2. Application Package Interface (API)



Contains hundreds of classes and methods 
grouped into several functional packages:

Language Support Package

Utility Packages

Input/Output Packages

Networking Packages

AWT Package

Applet Package

The Evolution of Java


1. Java 1.0

2. Java 1.1 (Add new library, redefine applet 
handling and reconfigured many features.)

3. Java 2 (Second generation). Version no:1.2
 (Internal version number of java library). Also 
known as J2SE [ Java 2 Platform Standard 
Edition].

  - Add swing, the collection framework, 
enhanced JVM etc.

4. J2SE 1.3

5. J2SE 1.4

6. J2SE 1.5

7. J2SE 1.6

Versions of Java



Three versions of the Java 2 Platform, targetted at different uses

Java 2 Micro Edition (J2ME)

Very small Java environment for smart cards, pages, phones,
 and set-top boxes

Subset of the standard Java libraries aimed at limited size 
and processing power

Java 2 Standard Edition (J2SE)

The basic platform

J2SE can be used to develop client-side standalone
 applications or applets.

Java 2 Enterprise Edition (J2EE)

For business applications, web services, mission-critical systems

Transaction processing, databases, distribution, replication.

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