If the figures on the left and the right look different, then the answer
probably is "YES" -- especially if the figure on the right is blank.
If Java is working in your web browser, the figures will look the same when
they load -- and you'll be able to rotate the figure on the right by dragging
it with the mouse.
A link where you can download Java, and get information about it, is presented
below.
Downloading and enabling Java
It could be that java is installed, but not enabled for your web
browser. In this case you can reset the Preferences in your web browser.
The preferences may be under a menu that's named after the web browser, or perhaps
under the Edit menu. Once you've found the Preferences, there is a division into
several tabs. In Firefox (on the Macintosh, anyway) you can enable java in the
Content tab. In Safari, you enable java in the Security tab.
In some situations, java is disabled for reasons of computer security.
If this is the case, then disable java after you finish looking at the figures.
The newest versions of java (read below for how to download) are best from the
viewpoint of computer security, but you do not need the latest version to
view my interactive pictures.
If the "easy method" described above doesn't do the job, but you'd
like to configure your web browser to use Java, here is a link where you can learn
how to get started:
Instructions and online help are available at the download
link, and there is a good chance of success if you follow the instructions
patiently. On the other hand, some parts of the process still may remain
mysterious. If so, you may want to ask for help from a friend who is
proficient in working with computer operating systems.
{Some languages other than English are available on the
download link, with suitable substitutions for /en, including /es (Spanish),
/fr (french), /ru (Russian), /de (German), /it(Italian) /sv (Swedish),
/pl (Polish), and some others.}
When you visit the page that is linked above, your
computer's operating system probably will be recognized. If you think
that it was recognized incorrectly, then click on the All Java
Downloads link on the left side of the page.
If you are using a Macintosh computer with Mac OS X, then you can obtain
an appropriate and up-to-date version of Java by running the Software Update
feature (on the Apple Menu). You also should check that Java is enabled
in your web browser. Generally, this is done by setting the browser
Preferences (in the menu that has the same name as the browser).
In Firefox, go to the Content tab; in Safari, go to the Security tab.
Java downloads are available at the download link for the following operating
systems:
Windows 7 and Windows XP, in both online and offline versions.
(Use the offline version if you encounter problems with the online
version, for instance with temporarily disabling your computer's firewall.)
