INTRODUCTION_O1.pptx
- 2. CONTENT • What is Java ? • Where is Java used ? • Features of Java • Java Program Translation • Java Virtual Machine • Java system overview • Java Program-Development phase • Advantage of java • Disadvantage of java
- 3. WHAT IS JAVA ? Java is Object Oriented Programming language as well as Plateform. Java was developed by a team led by James Gosling at Sun Microsystems. Java is a first programming language which provide the concept of writing programs that can be executed using the web.
- 4. WHERE IS JAVAUSED ? According to the Sun , 3 billion devices run java. There are many devices where Java is currently used. Desktop Applications - Acrobat reader, Media player, Antiviruses etc. Web Applications - irctc.co.in , javatpoint.com etc. Enterprise Application – Banking Application, Business Application. Mobile. Embedded System. Games. Robotics.
- 5. FEATURES OF JAVA • Java is Simple. • Java is Object Oriented • Java is Distributed • Java is Architecture Neutral • Java is Robust • Java is Interpreted and Compiled • Java is Secure • Java is Portable • Java is Multi-Threaded
- 6. JAVA PROGRAM TRANSLATION Hello.java javac Hello.class Interpreter for WinXP Interpreter for Mac Interpreter for Unix Source Program Java Compiler Java Bytecode
- 7. JAVA VIRTUAL MACHINE Java virtual machine is the like usual computer which translate high level language into machine language. Just like that Java virtual machine also translate Bytecode into machine language. JVM are available for many hardware and software Plateform.
- 8. WHAT IS OOP ? Object-oriented programming is a method of implementation. A language in which everything represent in the form of Object is called Object Oriented Programming Language. It not only makes the program less complex but also makes the software reuse feasible and possible. Java is not truly Object Oriented Programing Language
- 9. CONCEPTS OF OOP • Object • Class • Encapsulation • Inheritance • Polymorphism • Abstraction
- 10. JAVA SYSTEM OVERVIEW Java Application Java Native Interface Java Programming Language Java Class Library Operating System Class Loader Verifier Execution Java Virtual Machine
- 11. DATA TYPES IN JAVA
- 12. GARBAGE COLLECTION Garbage collection is the mechanism that De allocate the memory of an object when it is no longer referenced by a variable. In C++, the memory of an Object is released by use of delete operator. Java virtual machine determines when to free up the memory of an object.
- 13. ADVANTAGES OF JAVA Java is simple language. Java does not support POINTERS. Java is first language in which programs can be executed using web. Write Once Run Anywhere (WORA).
- 14. DISADVANTAGES OF JAVA Slow Performance. No support for Low level programming. Poor features in Java. No control over Garbage Collection.