Lab 3 - ICS 111

ICS 111, Introduction to Computer Science
Lab 3 - Modifying Hello World Program - September 9

This lab will help the student by:

Familiarizing the student with the way that homework should be submitted.
Teaching the student how a JAVA program is created/edited
Teaching the student how to compile and run a JAVA program
Practice making Strings
Using String Methods
String Concatenation

Instructions:

Note: The login / password that you signed up for is for using the computers in the lab. This user name / password is only for gaining access to the lab computers, and has nothing to do with logging into UH UNIX. Also, be careful and make sure that you logout from the computers when you leave the lab or other persons may see your stuff or use your account to do "bad" things.

To receive credit for this lab assignment, you must be finished by Tuesday, September 9, at 11:59 p.m. After this time you will not receive any credit. Future lab assignments will be due by 11:59 p.m. on the day of the lab assignment.

1. Login to UNIX (Secure Shell in Windows)
    - If you're at home, a good program to use to connect to UNIX is Putty (click here to download). The putty program is executable and doesn't need to be installed.
    - Host name is: uhunix2.its.hawaii.edu
    - Your user name is the first part of your UH e-mail address. If your UH email address is 'frank@hawaii.edu', your user name would be 'frank'. Your password is the same as your e-mail password.

2. Create a Java file using Pico (Getting Started with Pico)

Open the hello world program you did for the last lab. You can copy it from your "Programming with JAVA" book. It is on section 1.6 page 11 if you haven't already done so.

3. Modify the file in Pico (Getting Started with Pico), then compile and run the "HelloWorld.java" program.

Do the following:

Add a String, called sName, which contains your name. (For example: String sName = "Matt")

Instead of printing 'Hello World' have your program print:
'Hi Matt, welcome to ICS111!!!' (Substitute your name for 'Matt' by concatenating the String you declared above into the print statement)
'your initial is M, that is a nice letter!' (Use a String method called charAt() to get the first character of the sName String. ex: sName.charAt(0); or you can use the substring method to pull the first letter out and store it as a string. ex: sName.substring(0,1);)

compile (UH UNIX command: javac2 HelloWorld.java)

run (UH UNIX command: java2 HelloWorld)

Notes: Don't forget that Java and UNIX are case sensitive. Therefore 'helloworld.java' isn't the same as 'HelloWorld.java'. Also, remember that your class name must match your file name. If your class name is 'Frank' then your filename would be 'Frank.java'.

* Your program must compile without any errors, and must run properly to receive credit for this lab.

4. Get into Pine (Getting Started with Pine, PDF)

Your e-mail should have the following subject: lab 3 / lastname (lastname should be substituted for your lastname) Not following this standard will result in a deduction of points.

5. Attach the file to an e-mail (See pages 11-12 in Getting Started with Pine, PDF)

control <J>, then control <T> allows you to browse and pick the file that you wish to attach

6. Send the e-mail / file to the ics111-lab@hawaii.edu account.

7. Check the webpage to make sure that the e-mail arrived. Note that this will be sent to the ICS 111 lab address (ics111-lab@hawaii.edu). This one is different from the ics111-homework@hawaii.edu. There are two different ones so we can have homework assignments and lab assignments separate.

Here are the URLs:
http://www2.hawaii.edu/~tp_200/bmf/ics111-homework.html
http://www2.hawaii.edu/~tp_200/bmf/ics111-lab.html

7. Once I (TA) get the e-mail in my account AND I can verify it on the web, you will receive your lab participation point. For grading policies on your lab, click here...

* Some may argue that it is easier to do this from WebMail. If you e-mail your homework from webmail, it means that you're not positive that it runs / works properly in UNIX. This could result in point deduction if your stuff doesn't work properly.