Sadegh Aliakbary Sharif University of Technology Fall 2010

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

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

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

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

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

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

High-Level Languages Fall 2010Sharif University of Technology8

Java Virtual Machine Fall 2010Sharif University of Technology9

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

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

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

Overview of the Example Fall 2010Sharif University of Technology13

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

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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

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

Further Reading Read Java page on Wikipedia Google this terms and phrases: Fall 2010Sharif University of Technology19 Java Java Mobile JVM Byte code Java Sun Java and C++ Java and C#

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

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

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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