A ThreeTier System Architecture Design and Development for Hurricane Occurrence Simulation

1
CHAPTER 1

• INTRODUCTION

2
CHAPTER GOALS

• To learn about machine, assembly and high level
  programming languages
• To become familiar with your computing
  environment and your compiler
• To compile and run your first Java program
• To recognize compiler, run-time and logic errors

3
Programming Languages

• Machine Language10101 101000 10000 1100100
  10100011 11110000
• Assembly Language
• iload intRatebipush 100if_icmpgt intError
• High-level languageif (intRate gt 100) . . .

4
The Java Programming Language

• Simple
• Safe
• Object orientation
• Platform-independent ("write once, run anywhere")
  
• Rich library
• Designed for the internet

5
Java Programs

• Applets
• Small programs designed to add interactivity to
  Web sites
• Downloaded with the Web page and launched by the
  Internet browser
• Servlets
• Run by Web server on the server
• Typically generate Web content
• Applications
• Programs that run standalone on a client

6
Becoming Familiar with your Computer

• Login
• Locate the Java compiler (Later)
• Understand files and folders
• Write a simple program
• Save your work

7
What youll do in Java
8
Bytecode
9
Integrated Development Environment

• Download Install Java JDK and NetBeans
• http//java.sun.com/j2se/1.5.0/download.jsp

click
10
click
11
select
then click
get jdk-1_5_0_07-nb-5_0-win-ml.exe
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doubleclick jdk-1_5_0_07-nb-5_0-win-ml.exe
follow the instruction of the wizard
13
NetBean
14

• File-gtNew Project

select
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Set the location
Set the file name
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Hello.java
// case sensitive in Java

• 1 public class Hello
• 2
• 3 public static void main(String args)
• 4
• 5 // display a greeting and exit
• 6 System.out.println("Hello, World!")
• System.exit(0)
• 7
• 8

// public class ClassName (same as filename)
// begin of the class
// main method
// begin of main method
// comments
// method call
// another method call, // every statement must
end with a semicolon
// end of main method
// end of the class
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Flow of Control

• Sequential processing
• System.out.println("Hello, World!")
• System.exit(0)
• Method call
• Selection (conditional branching)
• Looping

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Syntax 1.1 Method Call

• object.methodName(parameters)
• Example
• System.out.println("Hello,World!")
• Purpose
• To invoke a method of an object and supply any
  additional parameters

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Compiling and Running

• Type program into text editor
• Save
• Compile into byte codes
• Build-gtCompile Hello.java (F9)
• Execute byte codes Run-gtRun Main Project (F6)

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Errors

• Syntax errorSystem.ouch.print("...")System.out.
  print("Hello)
• Detected by the compiler
• Run-time error
• Detected by JVM
• Logic errorsSystem.out.print("Hell")
• Detected (hopefully) through testing

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The Edit-Compile-Test Loop