Object Oriented Programming. Objectives

Transcription

1 Object Oriented Programming Fri, (Lect) Prof. Dr. Ing. Kalamullah Ramli 1 Objectives Understand Object Oriented Design Paradigm Understand principles of and best practice on developing and analysing Object Oriented System Software Capable of designing, initializing and implementing Object Oriented System Software 2 1

2 Syllabus of Course W Topics Date Lect Task 1Introduction to OOP Sep-3 KLM reading Chap 2, Chap 3, Chap 4 (Cisco-Sun) 2Object Oriented Principles Sep-17 KLM reading Chap 5, Chap 6, Chap 7 (Cisco-Sun) 3Inheritance Sep-24 KLM reading Chap 8 (Cisco-Sun) 4Polymorphism Okt-1 KLM review reading Chap 2 to Chap 8 5Java Packages, AWT Okt-8 KLM reading Chap 9, Chap 10 (Cisco-Sun) 6Introduction to Java Networking, Applets, Graphics Java Networking: Applets, Remoted Method Invocation 7(RMI) Mid-Test Okt Okt-15 KLM reading Chap 11 (Cisco-Sun) Okt-23 KLM Overview all read chapters 7 Nov-5 KLM exercise, reading Chap 12 (Cisco-Sun) 8Lab Exercises: setting, initializing, implementing Object Nov-12 KLM exercise, reading Chap 13 (Cisco-Sun) Oriented Applications 9 Nov-19 KLM exercise, reading Chap 14 (Cisco-Sun) 10 Nov-26 KLM exercise, reading Chap 15 (Cisco-Sun) 11Project Development, Supervising Dec-3 KLM Developing 12Project Development, Supervising Dec-10 KLM Developing Final-Test Des 3 References Deitel, Java How to Program 6th Ed., Prentice Hall, ISBN: Cisco & Sun, Java Programming, Cisco Networking Academy 4 2

3 Lecture 1 Introduction to Object Oriented Programming 5 3

4 Hardware components Software and programming Introduction to Java Integrated Development Environment (IDE IDE) Central Processing Unit (CPU) Persistent Data Storage Hard Drive, CD, Diskette, ROM Volatile Storage Random Access Memory (RAM) Peripherals Mouse, Keyboard, Screen, etc 4

5 Instructions that tell the hardware what to do Three ways to obtain software Buy pre-written software Modify pre-existing software Write the software Tools for the user Usually a collection of programs Provide a user interface Accept input React to requests Examples: Microsoft Office, Netscape Navigator 5

6 Program that controls the computer hardware Provides a consistent way for applications to access the hardware Many Operating Systems exist, mostly incompatible with each other Applications must be written specifically for the target Operating System Digital CPUs require binary instructions Early computers were programmed with electrical switches Very difficult to write programs Early languages used mnemonics that were translated to binary for the CPU Higher-level languages allow the programmer to ignore the details 6

7 Early high-level languages were procedural Programs were a list of sequential steps Programmer had to think like the computer Object-oriented Programming (OOP) uses general purpose components Components are then assembled in to an application Components are called Objects Objects Object perform specific functions Objects interact by sending & receiving messages Programmer is focused on coordinating the object interaction Closely models human problem-solving 7

8 Punctuation Symbols used Vocabulary The languages keywords Identifiers Used to reference data Operators Symbols representing commands Syntax Rules for combining the language s elements Compiled The program is translated in to the CPU s binary language once it is completed Interpreted The individual instructions in the program are translated immediately before they are executed 8

9 Originally designed for consumer devices Had to be small, simple, portable Ideal for use over the Internet 9

10 Java programs written as text files Java compiler creates a program file consisting of Byte Code The byte-code file is sent to the target computer, which has a Java Virtual Machine (JVM) The JVM interprets interprets the byte-code, one instruction at a time A Separate JVM is required for each Operating System & CPU 10

11 Create Java Programs with a text editor or Integrated Development Environment (IDE) Use a compiler to create the byte-code class files (Such as JDK) A Java Virtual Machine (JVM JVM) on the target computers /** * A Java Program Student */ // This program will say hello public class sayhello { public static void main(string args[]) { String name = Student ; int number = 1; System.out.println( Hello ); System.out.println(name); System.out.println( Your lucky number is + number); } } Comments Class definition Data & methods The main method Punctuation 11

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