Eclipse Java launch configuration file path
Solution 1:
You can find the configuration files in :
<workspace>/.metadata/.plugins/org.eclipse.debug.core/.launches
There should be a *.launch file for every configuration you have in this workspace stored there.
Solution 2:
I'm not certain where Eclipse stores the 'local' run configurations (likely somewhere under the workspace .metadata directory), but under the 'common' tab of the Run Configurations dialog, there's an option to save it as a 'Shared file' within a project, in which case it will show up in your project directory.