I spent quite a bit of time modifying my Java code style settings to be the way I like.
For example, go to Windows -> Preferences -> Java -> Code Sty
If you haven't set "project specific settings", it is in
workspace\.metadata\.plugins\org.eclipse.core.runtime\.settings\org.eclipse.jdt.ui.prefs
If you have "project specific settings", it is in the ".settings" directory of your project.
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That latter option (project specific settings) makes it easier for you to version it in your source control tool, as part of the other project files you would want to get back when doing a checkout of a new version of your project somewhere else.
See "Do you keep your project files under version control?" for more.