The image that is shown for a launch configuration type in the launch dialog is contributed using the org.eclipse.debug.ui.launchConfigurationTypeImages extension point. This extension associates an image file with the id of a configuration type.
The markup for the Java application image is as follows:
<extension point="org.eclipse.debug.ui.launchConfigurationTypeImages"> <launchConfigurationTypeImage icon="icons/full/etool16/java_app.png" configTypeID="org.eclipse.jdt.launching.localJavaApplication" id="org.eclipse.jdt.debug.ui.launchConfigurationTypeImage.localJavaApplication"> </launchConfigurationTypeImage> ...