CS3134: Andy’s Recitation 1
[ Announcements | Course Info | Schedule & Homeworks | Resources | Webboard & Grades ]

Useful Programs to Have and Useful Websites

Many of these resources can be found on the resources pages but I will include them here since they were covered in my recitation.

• Javadoc documentation for JDK 1.4.2. This is the most useful tool that you could ever use. Includes detailed explanations of all of Java’s core classes.
• SSH This is a free SSH client and Secure File Transfer Client for Windows. Download: SSHSecureShellClient-3.2.5.exe (or you can use TeraTerm or PuTTy)
• X-Win32 This will allow you to export you display from Newcunix so you can remotely use graphical linux tools

Walk Through for Logging On and Developing on Newcunix

You do not need to develop on newcunix but you must be sure that your code will run on it. These instructions are by no means the only way to do this. This is for Windows users.

1. Log on newcunix.cc.columbia.edu using SSH, TeraTerm, or, PuTTy.

2. Start X-Win32

3. At the command prompt (in your SSH window) type “export DISPLAY=IPADDRESS:0” where IPADRESS is you address. There are many ways of finding this, the easiest being selecting the DISPLAY tab in X-Win32.

4. Type “Emacs filename.java” where filename is the name of the file you will be editing. An emacs window should pop up on your desktop ready for use. If this doesn’t happen, there is a mistake in step 2 or most likely 3.

5. In Emacs, under “Options”, choose “Syntax Highlighting”. This will allow for useful coloring.

6. To compile, on the command line, type “javac filename.java” where filename is the name of the file

7. To run, type “java filename”, note you do not use the .java or .class extension

8. When you are finished with your project submit by typing “/opt/ACISsubmit/bin/submit cs3134”. This will submit everything in your directory and send you an email confirmation.

You do not need to remotely develop on newcunix, you could use NetBeans, or Eclipse and develop on your own machine.

Example Code

• Hello.java This is basic Hello World code. It demonstrates the minimum needed to run some Java code.
• PrintNumbers.java This code takes a series of numbers as command in arguments and then prints them out. It demonstrates command line input, converting strings to integers and back again, string concatenation, and the .length method for arrays. Example run: “java Print Numbers 3 4 5”
• SaveKeyboard.java This code takes input from the keyboard and saves it to a file. It demonstrates reading from the command line, writing to files, try, catch, finally, and exceptions. Try entering comma separated data for use with ParseFile.java
• ParseFile.java This code reads from a file splits it up and prints it out. It demonstrates reading from files, and stringtokenizer