Java was originally developed by Sun Microsystems and created by James Gosling to be a platform-independent language for developing software for networks and the internet. It has characteristics such as being portable, secure, object-oriented, and robust. The document discusses Java's history and evolution, its uses in different editions, and its key characteristics like being simple, distributed, and able to run on any architecture.

1. JAVA PROGRAMMING
By:
SADIQ AMINZAI
7/12/2022
Sadiq Aminzai | 0772 50 20 20 | +93789 68 10 10 | sadiq.szu@gmail.com
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2. CONTENTS
 Introduction to Java
 Why Java is important?
 What is Java?
 Characteristics of Java
 Java Environment
 JDK Evolution…
 Java Editions
 WORA (Write Once Run Anywhere)
 Applications of Java
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3. INTRODUCTION TO JAVA
 Java is a Programming Language.
 It was originally developed by SUN MICROSYSTEM.
 It is created by James Gosling.
 James Gosling was unhappy using C++ programing so he developed Java.
 They developed a platform independent software based on the power of
networks that can run on different application areas, such as computers and electronic
devices.
 It was initially called ‘Oak’.
 It was renamed as ‘JAVA’ released in 1995 as a core component of
Sun Microsystems Java Platform.
James
Gosling
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4. WHY JAVA IS IMPORTANT?
Two reasons:
1) Trouble with C/C++ language is that they are not portable and are not platform
independent languages
2) Emergence of World Wide Web (WWW), which demanded portable programs.
 Portability and security necessitated the invention of Java.
 Note: A portable application (also called as standalone app) is a software product
designed to be easily moved from one computing environment to another.
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5. WHAT IS JAVA?
 A general purpose object-oriented language.
 Write Once Run Anywhere (WORA).
 Designed for easy Web/Internet applications.
 Widespread acceptance.
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6. CHARACTERISTICS OF JAVA
 Java is simple.
 Java is object-oriented.
 Java is distributed.
 Java is interpreted.
 Java is portable.
 Java is robust.
 Java is secure.
 Java is multithreaded.
 Java is dynamic.
 Java is architectural-neutral.
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7. JAVA IS SIMPLE
 Java was designed to be simple and familiar to
learn languages.
 Fundamental concepts can be grasped quickly as
the features borrowed
from C and C++.
 Featured were removed that led to poor
programming practices or were
rarely used.
 It does not use pointers, goto statement,
preprocessor header files etc.
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8. JAVA IS OBJECT-ORIENTED
 All coding and data reside within object and classes.
 Java has built-In exception handling.
 Everything in Java (except the primitive data types) is an object.
 The object model in Java is simple and easy to extend so that complex programming
problems can be reduced to simple solutions.
 Extensive set of classes, arranged in packages.
 E.g. java.awt, java.io, java.net
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9. JAVA IS DISTRIBUTED
 Java is network friendly.
 Java is designed as a distributed language for
creating applications on networks.
 Multiple programmers can work together on a
single project from multiple remote locations.
 Both data and programs can be shared on
networks.
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10. JAVA IS INTERPRETED
 Java is both a compiled and Interpreted language.
 Java compiler generates platform-independent byte codes that are interpreted into
machine readable instructions by a Java Virtual Machine (JVM) or Java Interpreter at
runtime.
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11. JAVA IS PORTABLE
 Java programs are designed to work in a networked environment on a variety of
computers and operating systems.
 The size of the primitive data types are machine independent.
 Compiler generates platform independent byte codes rather than native machine code, so
it can be implemented on any machine.
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12. JAVA IS ROBUST
 Robust means strong.
 Java has hard and fast rules for compile time and runtime error checking.
 Java supports automatic garbage collection so all memory corruptions or unauthorized
memory accesses are impossible.
 Many error-prone features of C/C++ programming were removed (i.e. pointer).
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13. JAVA IS SECURE
 Usage in networked environment requires more security.
 JVM verifies all byte codes before execution and ensures all programs follow the rules
regarding object access and usage.
 Java ensures that program cannot gain access to memory locations without proper
authorization.
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14. JAVA IS MULTITHREADED
 This feature allow us to handle multiple tasks simultaneously.
 Designed to run multiple thread.
 Easy to implement.
 Other systems have provided facilities via light weight libraries, but Java has inbuilt
language support.
 Great for multimedia displays.
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15. JAVA IS DYNAMIC
 Provides a highly dynamic runtime environment.
 Allows dynamically linking in new class libraries, methods and objects.
 New code can be linked on demand from anywhere on the network and new types can be
created as needed dynamically.
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16. JAVA IS ARCHITECTURAL-NEUTRAL
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17. WORA (WRITE ONCE RUN ANYWHERE)
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18. JAVA ENVIRONMENT
 Java includes many development tools, classes
and methods
 Development tools are part of Java Development
Kit (JDK) and
 The classes and methods are part of Java Standard
Library (JSL), also known as
Application Programming Interface (API).
 JDK constitutes of tools like Java compiler, Java
interpreted and many more.
 API includes hundreds of classes and methods
grouped into several packages according to their
functionality.
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19. JDK EVOLUTIONS
 To check version use command CMD  java –version
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20. JDK EVOLUTIONS (CONT’D)
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21. JAVA EDITIONS
 J2SE (Java 2 Standard Edition):
 To develop client-side standalone applications.
 J2ME (Java 2 Micro Edition):
 To develop applications for mobile devices such as cell phones.
 J2EE (Java 2 Enterprise Edition):
 To develop server-side applications such as Java servlets and Java server pages.
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22. APPLICATIONS OF JAVA
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23. ANY QUESTION?
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24. 7/12/2022
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