Networked

7. Networked: There are two types of networks in the real world. They are networks.First is Un-trusted networks: A network is called to be connected non-autonomous architecture network architecture, we create runs on single server and it can be access in limited graces. applications we may use a technology called by small scale organization.Second is  Trusted network: A network is said to be autonomous architecture. Trusted network create distributed applications and it can be access in unlimited graces. J2SE (Core JAVA)  Notes un-trusted networks un-trusted network in which there exists n number of architecture. Un-trusted network is also called as centralized applications. A centralized application In order to develop J2SE and these kinds of applications are preferred trusted network in which there exists n number of is also calledas WAN. Using this network, we can applications. A distributed application is one which runs on In order to develop distributed applications and trusted inter LAN. Using this is one which centralized

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multi threading in Java

Definitions of multithreading : . A flow of control is known as  A multi threaded program . A program is said to be multi threaded program . For each  sub flow of controls are executing concurrently. Such type of applications is known multi threaded application.

STML : The languages like C, C++ are treated as (STML). SMTL are those in which there exists single threading.MTML : The languages like JAVA (MTML). MTML are those in which there exist multithreading. Whenever we write a foreground/child thread .

 A foreground thread is one which always executes user defined sub program there is a possibility of existing n number of program Distributed: A service is a said to be a can be accessed by n number of clients across the globe. In order to develop applications we must require architecture called applications we require a technology called scale organizations.
 Distributed: A service is a said to be a can be accessed by n number of clients across the globe. In order to develop applications we must require architecture called applications we require a technology called scale organizations.
There are two kind of languages1.                STML2.                MTML

 .A background thread is one which always monitors the status of and every JAVA program . Hence background thread is distributed.

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Feature Of Java

FEATURES OF JAVA:

The main features of java are

1. Simple

2. Platform independent 

3. Architectural neutral 

4. Portable 

5. Multi threading 

6. Distributed 

7. Networked 

8. Robust 

9. Dynamic 

10. Secured 

11. High performance 

12. Interpreted 

13. Object Oriented Programming Language J2SE (Core JAVA) Notes

1. Simple:  These reason makes java simple:

                       i. JAVA is free from the pointers hence it take less development time and less

                          less   execution      time         [whenever we write a JAVA program we write 

                           without pointers and internally it is converted into the equivalent pointer program]. 

                    ii. Rich set of API (application protocol interface) is available to develop any
                         complex   application. 

                    iii. The software JAVA contains a program called garbage collector which is always used 

                            to  collect unreferenced (unused) memory location for improving performance of a  

                           JAVA          program. [Garbage collector is the system JAVA program which runs in                                                       the  background along with regular JAVA program to collect unreferenced memory 

                          locations by running at periodical interval of times for improving performance java                            of    applications. iv. JAVA contains user friendly syntax’s for developing                                                       applications.

 2. Platform Independent: A program or technology is said to be platform independent if and only if which can run on all available operating systems. The languages like C, Cpp are treated as platform dependent languages since these languages are taking various amount of memory spaces on various operating systems [the operating system dos understands everything in the form of its native format called Mozart (MZ) whereas the operating system Unix understands everything in its negative format called embedded linking format (elf). When we write a C or Cpp program on dos operating and if we try to transfer that program to Unix operating system, we are unable to execute since the format of these operating systems are different and more over the C, Cpp software does not contain any special programs which converts one format of one operating system to another format of other operating system]. The language like JAVA will have a common data types and the common memory spaces on all operating systems and the JAVA software contains the special programs which converts the format of one operating system to another format of other operating system. Hence JAVA language is treated as platform independent language.

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History Of Java

Microsoft System has developed this technology known  JAVA. The technology is called DOT NET Microsoft (as on today). That is why DOT NET technology called JAVA will run on all operating system’s irrespective of their providers therefore it is called platform independent technology The slogan of JAVA is “Write One’s Reuse/Run Anywhere J2SE (Core JAVA) Notes applications, two software companies came up Sun Micro System. DOT NET and Sun JAVA. Both this technologies are known or called distributed technologies will run only on that operating system’s which are provided by technology is platform dependent technology technology. (WORA)”. and server whose Micro System has technologies. form technology. Whereas, the JAVA J2SE (Core JAVA) Notes By Mr. K.V.R Page 3 DOT NET technology is not freely downloadable where as JAVA freely downloadable.so java is a freeware. DOT NET supports Microsoft developed design patterns (general designed patterns are not supported) whereas JAVA supports all the design patterns which are available in IT. Design pattern is a predefined and proved rule by third party industry experts to avoid the receiving problems which are occurring in software development.

 History of JAVA: JAVA is a distributed technology developed by James Gosling, Patric Naugton, etc., at Sun Micro System has released lot of rules for JAVA and those rules are implemented by JavaSoft Inc, USA (which is the software division of Sun Micro System) in the year 1990. The original name of JAVA is OAK (which is a tree name). In the year 1995, OAK was revised and developed software called JAVA (which is a coffee seed name). JAVA released to the market in three categories J2SE (JAVA 2 Standard Edition), J2EE (JAVA 2 Enterprise Edition) and J2ME (JAVA 2 Micro/Mobile Edition). i. J2SE is basically used for developing client side applications/programs. ii. J2EE is used for developing server side applications/programs. iii. J2ME is used for developing server side applications/programs. If you exchange the data between client and server programs (J2SE and J2EE), by default JAVA is having on internal support with a protocol called http. J2ME is used for developing mobile applications and lower/system level applications. To develop J2ME applications we must use a protocol called WAP (Wireless Applications Protocol).

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Introduction of Java

 In IT we develop two types of applications. They are applications. A stand alone application applications are not sharable. System software applications. • System software is used for developing functionality of hardware devices. Examples are C and ALP (Assembly Language Programming). • Application software is used for developing organizations oriented applications. This is also known as backend software’s released till now. • Internet software is used for developing A distributed application is one which can be is also one which runs in the contest of the must use client-server architecture In client-server architecture server program. A client program server. A server program is one which will do three operations processing the client request and All the above three operations are performed by the server the data between client and server we must use a protocol called J2SE (Core JAVA) Notes stand alone applications is one which runs in the context of local disk. and application software comes under software’s. Examples are dbase, dbase III plus, FoxPro, oracle versions distributed applications. accessed across the globe. Distributed application World Wide Web. To develop distributed applications architecture. we must hare at least two programs they are is one which always makes a request to get the service from the receiving the request from client, sending the response to the client. rations concurrently. In order to exchange http (hypertext transfer protocol and distributed All stand alone stand alone we client program and protocol). Protocol is a set of values which are defined to exchange the data between client an either locally or remotely. In order to develop distributed applications names are Microsoft System and Microsoft System has developed a technology called developed a technology called JAVA The technology DOT NET Microsoft (as on today). Hence DOT NET technology called JAVA will run on all operating system’s irrespective of their providers hence is called platform independent technology The slogan of JAVA is “Write One’s Reuse/Run Anywhere J2SE (Core JAVA) Notes applications, two software companies came forward Sun Micro System.

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