[Java-gnome-developer] how to specify classpath

[한. <yut...@gm...>]

I use Sun java from debian.

// example.java
import javax.swing.JTextField;

public void .... {
.. blah.. blah..
}
//end of example.java

as you know(s) `javac example.java` works.
because probably javax packages were registered by sun java, some
where as global settings (classpath).

To compile 'ExamplePressMe.java'; downloaded from
'http://java-gnome.sourceforge.net/4.0/doc/examples/button/ExamplePressMe.html';
'javac ExamplePressMe.java' shows error that It can't find where they are.

My error :
$ javac ExamplePressMe.java -classpath /usr/share/java
ExamplePressMe.java:13: package org.gnome.gdk does not exist
import org.gnome.gdk.Event;

Debian :
'libjava-gnome-java' distribution package contains gnome/gtk jars in
/usr/share/java

$ jar tf /usr/share/java/gtk.jar | more
.. blah.. blah..

org/gnome/gdk/GdkExtensionMode.class
org/gnome/gdk/EventExpose.class
org/gnome/gdk/GdkGravity.class
org/gnome/gdk/Keyval.class
org/gnome/gdk/GdkInputMode.class

Would you tell me how I can make javac recognize these classpath, plz?