Fundamental : Concept of AS JAVA part1

I will explain about SAP Netweaver AS Java , for my favorite, i will explain fundamental of what is AS Java at SAP environment, we already know about SAP netweaver AS ABAP for many application server installed of many customer in the world.

SAP come with ABAP for core of application, but for trend technology, SAP started adopt Java Enterprise for support their product, so we called SAP netweaver AS Java.

Before i explain more about AS Java, its better i try to explain what SAP Web Application server is.

SAP Web Application Server is scalable and reliable component platform, this technology platform provides a complete development infrastructure, for developing, distribute and execute platform-independent , robut and scalable web services and business application.

SAP Web Application Server support both ABAP and Java also web services through ICM (Internet Communication Manager) for SAP Web As 6.10, in the next technology is SAP Web As 6.20

lets continue more deep with SAP Web Application AS Java....

maybe, we already heard about Java, this is a like programming language (introduced by Sun Microsystem in 1995), platform-independent technology. etc. But if we are in SAP environment, we will face this tehcnology simpler than you know Java as usual.:-)

As SAP Web AS 6.20, we are served two technology, we can use ABAP Technology and Java Technology as Development Language.

Java can run in any platform without change any code for which a Java Runtime Environemnt (JRE), Java can run at any Operating System for UNIX, Windows,Linux, MacOS, OS/2,etc

Properties of Java
you have to know different of two basic types of Java Programs

• Applications, Java programm can run at computer like client-server application accross the internet/intranet
• Applets, we called this as "little application", we can face this application when we use small application through web browser. we can state this application client-side application.

IMPORTANT : Java not equal Javascripts, its totaly different. Do not always connected "java" as "java programming". Java script is embedded at HTML, java script was developed with HTML pages. Java scrips is client-side script and not independent programming language, so this script dependent what web browser use.

Java is independt programming language, unlike traditional programming language which generates machine code depends on specifi platform, but Java produces program code at Virtual machine (JVM - emulate processors) and we call it bytecode

Virtual machine as interface between java and real hardware. with all excellent concept of Java technology, SAP also use the concept of cross-platform virtual machine in the ABAP, ABAP program of SAP converted program code into bytecode which intepreted by ABAP Virtual Machine , ABAP work process (WP)

continue.......