Programming Software Applications

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• Programming Software Applications
• Week 1
• Dr. Xiaohong Gao
• Trent Park B107, ext. 2252
• x.gao_at_mdx.ac.uk

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Course Objectives (1/2)

• Upon completing the course, you will understand
• Java applications
• Primitive data types
• Java control flow
• Methods
• Object-oriented programming
• Inheritance
• Polymorphism
• Core Java classes (Swing)
• Graphics

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Course Objectives (2/2)

• You will be able to
• Write applications
• Develop a simple GUI interface
• Write interesting projects
• Establish a firm foundation on Java concepts

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Learning Patterns

• Lecturer(1.5 hours) theory with sample programs
• Labs (1.5 hours) Practice theory using Java
  programs
• Workshops/seminars discussion/reflection

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Assessment Pattern

• Exam (3 hours) ---- 70
• Course work ---- 30

2 Mini-tasks 10
Project 20
Note You have to pass both coursework and exam
in order to pass the module.
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Contact Information

• Duty tutor time
• Friday, 1230-1330, Bevan Building

• Email
• x.gao_at_mdx.ac.uk

• Learning Materials
• http//www.cs.mdx.ac.uk/staffpages/xiaohong/cmt400
  1

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Introduction to Java

• Objectives
• What Is Java?
• Getting Started With Java Programming
• Compiling and Running a Java Application
• Compiling and Running a Java Applet

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Example 1 --- Using TextPad
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2. File ? New 3. File ? Save As ? Hello1.java
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3. Tools ? Compile Java
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4. Tools ? Run Java Application
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What Is Java?

• History
• Characteristics of Java

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History

• James Gosling
• Oak
• Java, May 20, 1995, Sun World
• HotJava
• The first Java-enabled Web browser

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Characteristics of Java

• Java is simple
• Java is object-oriented
• Java is distributed
• Java is interpreted
• Java is robust
• Java is secure

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Characteristics of Java

• Java is architectural-neutral
• Java is portable
• Javas performance
• Java is multithreaded
• Java is dynamic

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JDK Versions

• JDK 1.02 (1995)
• JDK 1.1 (1996)
• Java 2 SDK v 1.2 (a.k.a JDK 1.2, 1998)
• Java 2 SDK v 1.3 (a.k.a JDK 1.2, 2000)
• Java 2 SDK v 1.4

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Java IDE Tools

• Inprise JBuilder (RAD) (www.inprise.com)
• Microsoft Visual J (www.microsoft.com)
• Visual Café by WebGain (www.webgain.com)
• JFactory by Rouge Wave (www.rougewave.com)
• Forte by Sun (www.javasoft.com)
• IBM Visual Age for Java (RAD) (www.ibm.com)

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Getting Started with Java Programming

• A Simple Java Application
• Compiling Programs
• Executing Applications
• A Simple Java Applet
• Viewing Java Applets
• Applications vs. Applets

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A Simple Application

• Example
• //This application program prints Welcome
• //to Java!
• public class Welcome
• public static void main(String args)
• System.out.println("Welcome to Java!")

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Compiling Programs

• On command line
• javac file.java

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Executing Applications

• On command line
• java classname

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Example

• javac Welcome.java
• java Welcome
• output...

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A Simple Applet (Optional)

• Example
• / This is an example of Java applets /
• import java.awt.Graphics
• public class WelcomeApplet
• extends java.applet.Applet
• public void paint (Graphics g)
• g.drawString("Welcome to Java!",10,10)

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Creating an HTML File

• lthtmlgt
• ltbodygt
• ltapplet code"WelcomeApplet.class"
• width 100 height 40gt
• lt/appletgt
• lt/bodygt
• lt/htmlgt

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Viewing Java Applets
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Applet Viewer Utility

• appletviewer htmlfile.html
• Example
• appletviewer WelcomeApplet.html

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Applications vs. Applets

• Similarities
• Differences

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Security Restrictions on Applets

• Applets are not allowed to read from, or write
  to, the file system of the computer viewing the
  applets.
• Applets are not allowed to run any programs on
  the browsers computer.
• Applets are not allowed to establish connections
  between the users computer and another computer
  except with the server wherethe applets are
  stored.

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Java books

• Dietel Dietel
• Advanced Java 2 Platform -How to program
• Prentice Hall,last edition
• Judith Bishop
• Java Gently,Third edition,Addison-Wesley

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Summary

• Introduction to the module
• Java characteristics