Download Everything is an Object

Getting Set-up to Develop
Java 2
Version 1.3
© 2001 by Ashby M. Woolf
Revision 2
Agenda
•
•
•
•
•
•
•
•
•
Step One and Two - Support Website and Mailing List
Download an Editor for Java and Install It
Enter a Java Program with the Editor
Download "Thinking In Java" Code Examples and the
book in HTML and check them out
Browse the Book and check out the Code Examples
Download a Java Systems Development Kit and set it
up
Compile and Run a Java Program
Download the Sun Documentation
Browse the Sun Documentation
© 2001 by Ashby M. Woolf
Revision 2
Steps One and Two
• Go to:
– http://www.awoolf.com/javaclass/index.htm
– Click on: The First Step, Getting Set-up
• Get on javaclass Mailing List
© 2001 by Ashby M. Woolf
Revision 2
What You Will Need
• A 32 bit Windows Platform
– Windows 95 / 98 / 2000 / NT 4.0
• About 160 MB of Free Disk Space
• An Hour plus the download time for
60MB
© 2001 by Ashby M. Woolf
Revision 2
Java Software Development Kit
JDK
© 2001 by Ashby M. Woolf
From http://java.sun.com/
Revision 2
Your IDE
(Integrated Development Enviroment)
• The Big Players
– Forte for Java
– Borland Jbuilder 4
– WebGain VisualCafe
– Oricle Jdeveloper
– Metrowerks CodeWarrior Professional
• Our Basic Choice
– TextPad
© 2001 by Ashby M. Woolf
Revision 2
Get and Install TextPad
• Go To
http://www.textpad.com/
• Download The Free Evaluation Copy
– The last time I checked TextPad cost $27.
The evaluation copy just asked if you
wanted to buy every hour or so of use.
Pay the $27 and it will stop asking.
• Install It
© 2001 by Ashby M. Woolf
Revision 2
TextPad Preferences
• TextPad is a general text editor but you would
like it to assume that you are typing Java if
you are entering a new file so it can help you
with the syntax.
– On the Configure menu select
"Preferences"
– In the Preferences dialog select "File"
– Set the default file extension to "java"
© 2001 by Ashby M. Woolf
Revision 2
Enter the Java Program
// HelloDate.java
import java.util.*;
public class HelloDate {
public static void main(String[] args) {
System.out.println("Hello, It's: ");
System.out.println(new Date());
}
}
© 2001 by Ashby M. Woolf
From Bruce Eckel's Thinking in Java, 2nd Edition, Page 119-120
Revision 2
Save the Java Program
• Create the directories:
– C:\tij
– C:\tij\my
and
– C:\tij\my\C02
• Save the program in the C:\tij\my\C02 directory with
the file name HelloDate.java
• tij is short for Thinking In Java, where we will put stuff
Bruce Eckel's book "Thinking In Java"
• my is a directory where you will put your work
• C02 is where we will put your work from Chapter 2 and the
program you just typed is from Chapter 2.
© 2001 by Ashby M. Woolf
Revision 2
Get Bruce Eckel's Book and Code
Examples
• Go to
http://www.bruceeckel.com/
• Under the title "Book and Book Support" fine and
follow the Book Download Links
• Pick One
• You are looking for 6 zip files for Thinking in Java,
2nd Edition (only about 1.5MB total)
• Download all 6
• Expand the 2 code files into C:\tij
• Expand the 4 book(html) files into C:\tij\book
© 2001 by Ashby M. Woolf
Revision 2
Check Out the Book
• With your web browser open the file
– C:\tij\book\SimpleContents.html
• Bookmark the file
• Browse Chapter 2 Everything is an Object
– Find the class HelloDate in Chapter 2.
© 2001 by Ashby M. Woolf
Revision 2
Check Out the Code Examples
• With TextPad open the file
– C:\tij\C02\HelloDate.java
This is the same stuff you typed into
C:\tij\my\C02\HelloDate.java
If later you have problems with your working copy
of HelloDate.java you can compare it with
the downloaded version from the book.
• In general leave the downloaded files unchanged.
Copy things you want to change to the
C:\tij\my\... directory to edit and change.
© 2001 by Ashby M. Woolf
Revision 2
Get and Setup Java 2 SDK
• http://java.sun.com/j2se/1.3/download-windows.html
• Download Java 2 SDK, v 1.3.0 Software for Windows 95 /
98 / 2000 / NT 4.0 (about 30MB to download)
• Run the install program
• Let it install into C:\jdk1.3
© 2001 by Ashby M. Woolf
Revision 2
Set PATH and CLASSPATH
• Add to PATH string
– C:\jdk1.3\bin; ... (or something like it)
This lets Windose find java.exe when you type java in a
command window
• Set CLASSPATH string to
– .;C:\jdk1.3\bin;C:\tij (or something like it)
"." lets Java find your program in the current directory
"C:\jdk1.3\bin" lets Java find the Java libraries
"C:\tij" lets Java find Libraries provided with Thinking In
Java
© 2001 by Ashby M. Woolf
Revision 2
Lets Compile and Run HelloDate
• From the Windose Start Menu>Programs open a
Command Prompt
• Make the current directory C:\tij\my\C02
– Can be done with cd C:\tij\my\C02
• Compile the program in HelloDate.java
– Can be done with javac HelloDate.java
The compiled program will be in HelloDate.class
• Run HelloDate.class
– Can be done with java HelloDate
• When done Close the Command window it will not be
needed for a while.
© 2001 by Ashby M. Woolf
Revision 2
Lets Compile and Run HelloDate
Again
• Open HelloDate.java in TextPad
• Compile the program HelloDate.java
– Do it with Compile Java on the Tools menu (or Ctrl+1)
The compiled program will be in HelloDate.class
• Run HelloDate.class
– Do it with Run Java Application on the Tools menu (or Ctrl+2)
• When done Close the Command window and
TextPad it will not be needed for a while.
© 2001 by Ashby M. Woolf
Revision 2
Get Sun Documentation
• Go to
http://java.sun.com/j2se/1.3/docs.html
• Download JavaTM 2 SDK Docs - HTML
Format (about 23MB)
• Unzip it to C:
– We want to put it in C:\jdk1.3\docs. In the
internal paths in the zip file will add the
\jdk1.3\docs
© 2001 by Ashby M. Woolf
Revision 2
Exploring Sun Documentation
• Start your browser and open the file
C:\jdk1.3.0\docs\index.html
• Bookmark the page
• Click on the API & Language link
• Click on the
Java 2 Platform API Specification link
• Use Index to find "Date - class java.util.Date"
• Click on the link Date and read a bit about Date
© 2001 by Ashby M. Woolf
Revision 2
Exploring Sun Documentation (Cont.)
• In the upper left browser frame there is a list
of Packages. Find java.lang and click on it.
– Now the lower left frame in the browser will have a
list of Interfaces, Classes, Exceptions and Errors
in the java.lang Package.
• In the lower left frame find the Class "String"
and click on it.
– Now the large frame on the right will provide
details about the String Class. Spend some time
reading the details but don't expect to understand
much.
© 2001 by Ashby M. Woolf
Revision 2
Exploring Sun Documentation (Cont.)
• In the upper left browser frame near the top
click on All Classes.
– Now the lower left frame in the browser will have a
list of all the Classes and Interfaces that are
included with Java. You will be able to build
additional classes and use those provided to build
your Java Systems.
• In the lower left frame scroll down the list and
take a guess at how many classes (and
interfaces) are provided.
– If you see a class name you can't resist click on it
and see the description to the right.
© 2001 by Ashby M. Woolf
Revision 2
End of Content
© 2001 by Ashby M. Woolf
Revision 2