How To Run Java

To compile and run a Java program on  studsys
your Java source code must be in a file ending with .java,
for  instance  MyProg.java .  The name of the file must match the
name of the public class defined in the file. You  compile  the
program by typing:

  javac MyProg.java

 This will create new  .class  files  in  the  current directory
corresponding  to  any classes  defined in your program. If your
program is an application you can run your program by typing:

  java MyProg

 If your program is an applet (e.g. MyApp.java), then you must
create an HTML file which  refers   to   the   applet. 
For instance, you could create a directory to work in with mkdir
and then move to that directory:

  mkdir First
  cd First

Then type in the code for your applet into MyApp.java and put
a line defining the applet into MyApp.html.  For instance,
you could use:

<applet code="MyApp.class" width=300 height=300></applet>


Then compile the applet:

  javac MyApp.java

Once the HTML file is written, you can view it using a web
browser, or the appletviewer program.  To display the applet
using appletviewer, you need to be running an
X-windows server (for instance, any of the connections to studsys from
the MSCS labs will work).  You start appletviewer with the command:

  appletviewer MyApp.html

This will cause a new window to open up on your desktop and display
the applet.
One of the advantages of using appletviewer is that you can  make
changes  and  see  the new  applet each time - this is harder to
accomplish with some web browsers.

You can also load the applet directly into Netscape by
specifying the directory location of the HTML file.  If you have
followed the above directions, your file is in the First subdirectory
of your home directory.  You would load this into the browser by
choosing Open Page from the File menu, then click the
Choose File... button to get a file choice window.  Move into the
First directory and choose MyApp.html (to Open in Navigator).