This extension point is used to register plugins that want to be activated on startup. The class given as the attribute on the startup element must implement the interface <samp>org.eclipse.ui.IStartup</samp>. Once the workbench is started, the method earlyStartup() will be called from a separate thread. If the startup element has a class attribute, the class will be instantiated and earlyStartup() will be called on the result. Otherwise, this method will be called on the plug-in class. Do not specify the plug-in class as the value of the class attribute, or it will be instantiated twice (once by regular plug-in activation, and once by this mechanism). If the extension does not provide a class as an attribute on the startup element, the plug-in's activator (plug-in class) must implement <samp>org.eclipse.ui.IStartup</samp>. Note that this form is deprecated and should no longer be used. Its functioning relies on the availability of the org.eclipse.core.runtime.compatibility plug-in and the org.eclipse.core.runtime.compatibility.registry fragment. Plugins that provide an extension to this extension point are listed in the workbench preferences and the user may disable any plugin from early startup. a fully qualified identifier of the target extension point an optional identifier of the extension instance an optional name of the extension instance a fully qualified name of the class that implements <samp>org.eclipse.ui.IStartup</samp>. If not specified, the plug-in class is used. Do not specify the plug-in class as an explicit value, or it will be instantiated twice (once by regular plug-in activation, and once by this mechanism). Since release 3.0. Release 2.0 Following is an example of a startup extension: <pre> <extension point="org.eclipse.ui.startup"> <startup class="org.eclipse.example.StartupClass"/> </extension> </pre> See interface <samp>org.eclipse.ui.IStartup</samp>. Copyright (c) 2002, 2005 IBM Corporation and others.<br> All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at <a href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a>