Under Windows, there are two installers, one that includes
a private copy of the Java Runtime Environment (JRE) and one that does not.
The installer applet is merely a wrapper for these two installers.
Download the installer with the private copy of the JRE if you
do not want to run the Ptolemy II demo applets and want
to have a stable self contained Ptolemy II installation that does not
rely on other versions of the JRE that might be on your machine. Note
that after installing with Ptolemy II with the private JRE you may
later download another JRE later to view the applets.
Note further that the private copy of the JRE includes
Most Windows users will use the installer with a private copy of the JRE
Download the installer without the private copy of the JRE if you
have either the JRE or the Java Development Kit (JDK) already installed.
JRE vs. JDK
To run Ptolemy II, the Java runtime environment (JRE) is sufficient.
To run the applets in a browser, the Java plug-in is required.
The JRE is bundled with the plug-in, so downloading the plug-in
also installs the JRE.
To extend Ptolemy II with your own
Java code, the Java development kit (JDK)
or an equivalent Java development environment is required.
The JDK includes a Java compiler.
Note that the Ptolemy II installers on this page
do not include source files.
If you want to extend Ptolemy II by writing your own actors, then
download the source and recompile.
Which Version of Java?
Ptolemy II requires Java 1.4 or later Java 1.4.1_02 is preferred.
Java 1.4.2-beta seemed buggy to us.
One way to determine what version of Java (if any) is installed
is to run our
Java Version Applet , which
uses the Java 1.4 plug-in.
Another way is to run the command below to see whether
you have Java installed, and whether it is the proper version:
If the command cannot be found, or the version that is printed is
less than 1.4, you should install the plug-in, JRE 1.4, or JDK 1.4
or use download the installer that includes a private copy of the JRE
2. Install Ptolemy II
Where to install?
Note that under Java 1.4.1_02, viewing local applets that have
spaces in the path name may fail if the applet tries to download a
data file. The workaround is to place the Ptolemy II installation in a
directory that does not have space in the pathname. For details, see
the Troubleshooting Guide
Ptolemy II Installers
Choose one of the Windows installers below
This page covers installing Ptolemy II via a traditional Windows Installer
Other formats include: