Ptolemy II 2.0.1 Web Edition Download

Ptolemy II Planet Ptolemy II is available in several formats.

This page covers installing Ptolemy II via the web using Web Start.

Other formats include:

  • Accessing Ptolemy II demonstration applets via the web
  • Installing Ptolemy II via a traditional Windows Installer
  • Installing Ptolemy II by downloading source and recompiling

    • This download of Ptolemy II uses an experimental web launching tool called Web Start that makes installation and updates particularly simple.

    Quick Start

    Java 1.5 problem

    Under Java 1.5, this version of the Ptolemy II Web Edition might not start up, you might see a message about 
    java.lang.NoClassDefFoundError: ptolemy/vergil/VergilApplication
    The problem is that Java 1.5 handles lazy downloads differently than previous versions. The workaround is to install a more recent version of Ptolemy II Web Edition.

    Installation Details

    Web Start is a product from Sun that is used to download the Ptolemy II 2.0.1 Web Edition.
    1. This web page attempts to detect whether Web Start is already installed. If the Quick Start list above contains
      Install Web Start from Sun (720KB - 8.6Mb)
      then download and install Web Start by following the Install Web Start from Sun (720Mb - 8.6Mb) link.

      If you already have the Java Runtime Environment version 1.2.2 (JRE 1.2.2) or higher installed, you only need the Java Web Start Update, which is 720Mb.

      If you do not have the Java Runtime Environment installed, or you are not sure, then you would need to download the Full Java Web Start package (5.7Mb), which inclues a JRE.
      If the above step is not present, then Web Start is already installed and you can proceed with clicking on the

      Ptolemy II 2.0.1 Web Edition (~15.9Mb)
      link and continue with step 4 below.
    2. After installing Web Start, restart your browser and return to this page.
    3. Hopefully, the Web Start detection will work and the Install Web Start from Sun (720KB - 8.6Mb) step will not be present.
      Even if the Install Web Start step is present, try downloading and/or opening the Ptolemy II 2.0.1 Web Edition (~15.9Mb), it could be that the Web Start detection has failed even though Web Start is properly installed.
      For example, under Opera 6.01 under Windows 2000, click on the Ptolemy II 2.0.1 Web Edition (~15.9Mb) link and select open. If Java Web Start has been installed, then it should start up automatically.
    4. The download is roughly 15.9Mb, roughly half the size of the application download is consumed by the HTML documentation of the Ptolemy II Java classes.
    5. After the download completes, you will be prompted with a window that states that the certificate from University of California Berkeley is valid. You should hit the Start button to proceed with start up.

    Places to go

  • For more information about installation, see the Web Start Help page.
  • The "Using Vergil" chapter from the Ptolemy II Design Document
  • Limitations