Core Java

Debasish Pratihari

What is Java


Java programming language is designed to meet the
challenges of application...
Core Java

Debasish Pratihari

JAVA Family
Java Standard Edition
Java
SE

J2SE APIs are useful to develop stand alone
appl...
Core Java

Debasish Pratihari

Programming in Java
You can use Java to create two types of programs:
 Applications
An app...
Core Java

Debasish Pratihari

Challenges of Enterprise Application
Development:






Programming Productivity
Integ...
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Lecture 1

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Notes on core java
sub- introduction-1

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Transcript of "Lecture 1"

  1. 1. Core Java Debasish Pratihari What is Java  Java programming language is designed to meet the challenges of application development in the context of heterogeneous, network-wide distributed environment.  Java is an object-oriented programming (OOP) language that uses many common elements from other OOP languages, such as C++  Java is a complete platform for software development  Java is suitable for enterprise large scale applications.  Java is available for smart devices and smart cards  The Java language was developed at Sun Microsystems in 1991 by James Gosling as part of a research project to develop software for consumer electronics devices- television sets, VCRs, toasters, and the other sorts of machines you can buy at any department store.  Java's goals were to be small, fast, efficient, and easily portable & for distributing executable programs via the World Wide Web to a wide range of hardware devices and across different platforms. Origin & History  Java began its life in 1990 as a new language called Oak.  Sun Microsystems had established a project group codenamed green to develop new products and expand Sun's markets.  Oak was originally designed for a personal digital assistant called *7 that Sun intended to market with a seamless graphical user interface.  The *7 was never marketed, and eventually Sun formed a company called FirstPerson to develop the *7 in TV set-top boxes for interactive television. Lecture/core/intro1/01 Page #1 feel the Technology…
  2. 2. Core Java Debasish Pratihari JAVA Family Java Standard Edition Java SE J2SE APIs are useful to develop stand alone applications and also client side applications like applets. It is much flexible to write multithreaded, network based and distributed applications. Java Micro Edition Java ME Java EE It is a new member added recently to Java family. Its APIs have been designed to produce programmable chips. Java Enterprise Edition It provides APIs for Server Side Programming. Java’s Features  Java Is Familiar and Simple  Java Is Object-Oriented  Java Is Distributed.  Java Is Interpreted.  Java Is Robust, Safer and More Reliable  Java Is Secure  Java Is Architecture Neutral.  Java Is Multithreaded  Java Is Portable  Java Is Having High Performance & Dynamic.  Java Is the Programming Language of the Web Lecture/core/intro1/01 Page #2 feel the Technology…
  3. 3. Core Java Debasish Pratihari Programming in Java You can use Java to create two types of programs:  Applications An application is a program that you can execute at the command prompt. Stand-alone applications can either be window-based applications or console applications. Applets o  o Applets are Java programs that execute within a Web page. Therefore, unlike applications, applets require a Java-enabled browser like Microsoft Internet Explorer 4.0 or later version. An applet is loaded and executed when a user loads a Web page, which contains the applet, through a Web browser. Why Programmers like java?       Easy to learn Write less and better code (less program metrics) Avoid platform dependencies Distribute software more easily Developing powerful applications easily Write Once Run Anywhere (WORA) Java is Open Source Java has many vendors • • • • Sun Microsystems IBM Oracle Bea Systems “recently acquired by Oracle) • Apache Software Foundation • JBoss Lecture/core/intro1/01 Page #3 feel the Technology…
  4. 4. Core Java Debasish Pratihari Challenges of Enterprise Application Development:      Programming Productivity Integration with Existing Systems Freedom of Choice Response to Demand o Availability o Scalability Maintaining Security Java & Java Community Process: 25%  Is established in 1998  Is a formalized process that allows interested parties to get involved in the future version and features of Java platform Java Specification Request (JSRs)  The formal documents that describe proposed specifications and technologies for adding to the java platform  Formal public reviews takes place before a JSR become final and the JCP executives vote o it.  A final JSR provides a reference implementation that is a free implementation of the technology in source code from and a technology compatibility kit to verify the API specification. Lecture/core/intro1/01 Page #4 feel the Technology…

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