This is an introduction to programming using  the Java programming language, a so-called object-oriented, imperative programming language. No background in computing is assumed.

What's New

  David White will be available in SC 74 from 7-10pm, Monday, to help with homework.

HW 4

Correct code for isLeapYear

Some slides covering material from week 10 lectures.

Some additional programs from week10 and week 11.

Solutions to selected problems from Midterm I

Some notes/programs from past and upcoming lectures in weeks 7-9

Some notes/programs from weeks 4 and 5 lectures

Solutions to selected problems from Homework 0

Solutions to selected problems from Homework 1

Click on fetch: to get a free FTP client for Macintosh
Make sure you click on the option: "apply for an educational or charitable license", and then you get it with no time limit for free. To get there click on "buy/upgrade" on the home page. When you use fetch you must choose to connect (to rintintin) via sftp (and not just ftp).

Coming soon: same info for PC owners once I find a free one that works!

The code (and some remarks) from week 3 lectures

Some questions sent to me by students, along with answers are listed in the following FAQ web page

A crash course on UNIX

A 1-page outline of Java for novices

A 3 page quick reference to the Java Programming language. This was writen for accomplished programmers, so it's a bit advanced now, but will become handy later in the course.

Some examples from week 2 lectures:

wk 2

Not so new

Updated Homework 3 file, with new instructions.

Additional note: IN HW 3, please call the third file Prime.java instead of prime.java. Make the appropriate change to the name of the class, too.

Homework 2 is available.

A review sheet for Midterm I

UPDATED!!! to include instructions on how to mail it in , and some new instructions for problem 5 (how to wrap it): Updated Homework 2

Some solutions to the Midterm I review sheet problems

Updated web page for HW 1.

Homework 0 has been updated to include specifics about how to name and mail your files, and some further description of the programs required. Note that the due date is Monday, Sept. 28, at 11:59 PM.

PC users: Here you can find clear instructions on how to set up Java (the so-called JDK) on your PC, running XP or Vista. It turns out you have to change TWO environment variables to get javac to run anywhere. Read the web page. It makes this very clear.

On using Cygwin-X on your PC: (windows Vista).

New and improved! (with graphics examples)

Purchase:
Cay Horstmann's BIG JAVA, 3rd edition, Wiley, 2008, ISBN ISBN: 978-0-470-10555-9 and read chapters 1 and 2.

Basic Information

The JAVA computing environment

1. Writing the text program in the Java language. (This program usually given a name of the form <program-name>.java) using your favorite program editor (i.e. a special-purpose word-processor)
2. Compiling the program with javac. This transforms the original program to a new one, in so-called bytecode, stored in a file called <program-name>.class)
3. Running the above-mentioned class file on the so-called "JVM", by issuing the command:
   java <program-name>.

This means one needs 3 pieces of software to play this game:

1. A program Editor
2. the java compiler javac
3. the JVM interpreter, called java

These three components are available on the PCs in SCI 74 (our lab) and almost all the PCs on the campus computing facilities. They are also available on rintintin.wesleyan.edu, a machine that can be accessed from (almost) any networked PC or MAC on Campus.

They can also be downloaded for free onto your own computer. See Other Resources below.

If you have a MAC with OSX then you already have everything you need! (this will be explained in class)

Midterms

• Midterm 1: Oct. 28, in class
• Midterm 2: Nov 30, in class.

Other Resources for this course

a brief tour of Java by Gosling (the creator of Java) and McGilton

To download the java and javac programs for your own use, (as well as a program editor)

For a MAC running OSX

You're in luck! You have almost everything you need. You need to know how to open a terminal window, and type javac or java when needed.

As for a program editor, you already have a windowless version of emacs. However, this is not mouse-senstive and a pain to use. So you will want to download Aquamacs.

You can also use another program editor for Java. Alpha Edit and BBedit work fine on Macs. (See me about this).

For a PC running Windows

(This is not trivial: roll your sleeves up)

CLICK HERE.

To SKIP all of this, and just connect to rintintin.wesleyan.edu

From the Mac: (note changes!!)

X11 is already installed on most Macs. look here for details

On a PC (not too trivial, but not so bad)

use your ssh program (if you don't have it or can't find it, this will be explained in lab) to connect to rintintin. You can still use emacs in "non-window" mode (by typing emacs -nw <filename>),

OR

download cygwin (read THIS WEBPAGE) and follow the same steps shown in lab! I'll show how to download cygwin in lab.

On a linux machine

Follow the same steps as on a MAC. If you lack javac or emacs, see me.

Other web resources for JAVA

• To download JAVA and related software, and documentation from SUN's main Java resources page
• Web page for the Textbook
• Java Tutorial online directly from the web... no messy pages to turn ;-)

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