We will now look at an unsophisticated three tier system.
It will use a WWW browser on a computer called
altair
that downloads a Java applet from a WWW server
running on
perseus.
The Java applet will display some buttons and
textfields.
A click on a button will cause the Java applet
to send a request (using JavaIDL) to
a Java application that is also running on
perseus.
This Java application will send (using JDBC)
an appropriate SQL statement
to a database server running on a computer called
hercules: