1. Sadegh Aliakbary Sharif University of Technology Fall 2010

2. Agenda Introduction to Course Java History Java Characteristics First Example Syllabus Evaluation Policy Fall 2010Sharif University of Technology2

3. This Course Covers: Java programming language Object Oriented Concepts Some Programming Skills Test Refactoring Code Smell Fall 2010Sharif University of Technology3

4. Java History Java was created in 1991 by James Gosling in Sun Microsystems. Initially called Oak in honor of the tree outside Gosling's window Its name was changed to Java because there was already a language called Oak. Sun Microsystems released the first public implementation as Java 1.0 in 1995 Java syntax is similar to C and C++. Fall 2010Sharif University of Technology4

5. Java Motivation The need for platform independent language To be embedded in various consumer electronic products like toasters and refrigerators Platform independent?! Hardware Operating System Fall 2010Sharif University of Technology5

6. Java Motivation (2) At the same time, the World Wide Web and the Internet were gaining popularity. Java could be used for Internet programming. Why? Platform independence Creation of Applets Now, Java is used mostly for server-side programming Fall 2010Sharif University of Technology6

7. The Java technology is: A programming language Java can create all kinds of applications A development environment A compiler (javac) An interpreter (java) A documentation generator (javadoc) … Compare it to C++ Fall 2010Sharif University of Technology7

8. High-Level Languages Fall 2010Sharif University of Technology8

9. Java Virtual Machine Fall 2010Sharif University of Technology9

10. Compile and Execution Stages Compare to C++ and Assembly.NET Framework Fall 2010Sharif University of Technology10

11. First Example Create a file named First.java Java class files have.java extension Note to naming convention Copy this lines to the file Note: File name and class name should be the same. Fall 2010Sharif University of Technology11

12. First Example (2) Run javac First.java Run java First We don’t use any IDE now. To highlight compile and run stages. Lets watch it in real world! Fall 2010Sharif University of Technology12

13. Overview of the Example Fall 2010Sharif University of Technology13

14. Java is Popular Some reports on programming languages popularity According to Job advertisements Book sales Finding code on the web … Fall 2010Sharif University of Technology14

15. Fall 2010Sharif University of Technology15 http://www.langpop.com updated in 2010

16. Fall 2010Sharif University of Technology16 http://www.tiobe.com/index.php/content/paperinfo/tpci/index.html

17. Characteristics of Java Java is simple Java is object-oriented Java is architecture-neutral Java is portable Java is interpreted Java is multithreaded Java is secure Java is robust Fall 2010Sharif University of Technology17

18. Conclusion Java is a Simple object oriented Robust And popular Java is platform independent. Write Once, Run Anywhere! Fall 2010Sharif University of Technology18

19. Further Reading Read Java page on Wikipedia http://en.wikipedia.org/wiki/Java_(programming_language) Google this terms and phrases: Fall 2010Sharif University of Technology19 Java Java Mobile JVM Byte code Java Sun Java and C++ Java and C#

20. Exercises Download and install JDK Write a program that prints your name on the console Compile and run the program Fall 2010Sharif University of Technology20

21. Evaluation Policy Final Exam: 4 Midterm Exam 1: 2 Midterm Exam 2: 2 Quiz & Attendance : 4 Assignments: 3 Projects: 6+ (Sum=21) If you don’t want to attend this class… Fall 2010Sharif University of Technology21

22. Topics Introduction to java language Java syntax, operators, conditions, loops, … Strings Arrays Object Oriented Programming Inheritance Polymorphism Collections Generics Exception Handling Files and I/O Threads Reflection Test Refactoring GUI Networking Fall 2010Sharif University of Technology22

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