• logged into your local CIP-pool workstation using your student account that you have got by the computing center of the TU.
• started a WWW browser (e.g. by entering netscape & on the command line of a terminal window).

How to use the Java System

1. Open a terminal window and type the following command to prepare step 3

   xhost +
   

2. Log in to the remote system sun01 as user ooad. This can be done with the following command:

   rlogin -l ooad sun01.sts.tu-harburg.de

3. Redirect the output to your local computer. This is done by the following command:

   setenv DISPLAY <local_computer_name>.cip2b.tu-harburg.de:0

   The <local_computer_name> can be found on a small printed label somewhere on your local computer.
   Example: If your local computer is called manwe, enter
   setenv DISPLAY manwe.cip2b.tu-harburg.de:0
4. Change to the directory that belongs to your working group:

   cd ooad<xx>

5. Start working with Java

Important Steps in Writing and Running Your First Java Program

1. Create some source code within your text editor like the class Cell

   xemacs &

   Don't forget to start the editor from the command line of sun01 and not from the command line or workspace menu of your local workstation.

2. Save it as .java - file, use the name of the class plus the extension .java (e.g. Cell.java)

3. Compile the source file: javac

   javac Cell.java 

4. You get bytecode within a .class - file (Cell.class)

5. Run your application by interpreting the primary class' bytecode

   java Cell

6. The Java interpreter looks for the main-method and executes it.