Get Azureus to start

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How To Start Azureus on Windows[edit]

The normal approach is simply to launch Azureus.exe

Note that the Azureus2.jar file itself *can't* be launched as a Java application

To start Azureus directly using Java you will need to use something like the following:

set classpath="C:\Program Files\Azureus\swt.jar;C:\Program Files\Azureus\Azureus2.jar"
java -D"java.library.path=C:\Program Files\Azureus" -classpath %classpath% org.gudy.azureus2.ui.swt.Main

See Commandline_options for additional arguments, for example -Dazureus.log.stdout=1

How to start Vuze on Windows without installation using jar method[edit]

This can be useful if, for instance, the installer does not work on your system. This is for x64 Windows only but could be made working with 32 bit Windows with a few changes.

1) Download the latest version of Vuze as jar file from sourceforge. At the time I am writing this it would be Vuze 5200 You should now have Vuze_5200.jar.

2) Download swt.jar from At the time this is Un-zip it and you should now have swt.jar.

3) Download the platform-specific native support files from and unzip them. You should now have


4) Create a folder in which all the needed files will come together. For this example we use the Download folder in the user's home directoy and create a subfolder named "Vuze"

5) In the Vuze folder, create a vuze.bat batch file.

 set classpath="%userprofile%\Downloads\Vuze\swt.jar;%userprofile%\Downloads\Vuze\Vuze_5200.jar"
 java -D"java.library.path=%userprofile%\Downloads\Vuze" -classpath %classpath% org.gudy.azureus2.ui.swt.Main

6) Copy these previously downloaded files into the Vuze folder as follows


7) Start vuze via executing vuze.bat

How To Start Azureus on Mac OS X[edit]

Some MacOS X users see the Azureus icon bounce in the dock and the program fails to load or hangs. This is easy to solve.

  • Open the Activity Monitor, which may reside in Applications/Utilities/.
  • Find an application called "java" or "java_swt" that is running.
  • Force-quit it by selecting it in the Activity Monitor window and clicking on the "STOP" button at the top of the window.

It may not be necessary to open Activity Monitor at all. While depressing the Command and Alt keys, hit Esc. Force Quit Applications will open. On my PowerBook, Azureus shows up as "org.gudy.azureus2.ui.swt.Main." Select it, then click Force Quit. Say you are sure and confirm that you will lose any unsaved changes. You should not lose any real data such as torrents.

You may need to do this several times, but things should improve.

  • Restarting your Mac should accomplish the same goal.
  • I had trouble when I installed the .jar file on its own, but the problem vanished after I started with the whole package.

Launch via Terminal/Command Line on Mac OS X[edit]

You'll need to first change to the directory that holds the application bundle. Then, to launch Azureus manually, run this (one line):

java -XstartOnFirstThread -cp -Djava.library.path=./ org.gudy.azureus2.ui.swt.Main