How to check the icon meaning in the eclipse (project explorer)?

In the eclipse, there are different icons bef开发者_如何学Core files and projects. I am asking if there is an explanation for those icons.

Considering the meaning of "Label decoration", you won't ever have a formal description of all the icons in a project Explorer: it depends on the plugins you have installed.

A plugin like EGit for instance will modify those icons with its own list of decorators:

As Harry Joy, mentions in the comments, the CTRL+N "new project" dialog is the closest way to list all of those icons.

It can be helpful though to know about the "User Interface Guidelines" for Eclipse to grasp their more general meaning:

For example, in the style section:

The two dominant colors, blue and yellow, bring harmony to the overall presentation of the user interface.
Themselves complementary, blue and yellow form a base on which to apply accent colors

Brown is used less than the other colors mentioned, but it is generally associated with specific types of objects: the Java "package", "bundle", and the "Enterprise Java Bean (EJB)".

This page contains meaning of all eclipse icons: http://help.eclipse.org/helios/index.jsp?topic=/org.eclipse.jdt.doc.user/reference/ref-icons.htm

UPDATE: This answer contains icon meanings per Eclipse version.

You can see a list of label decorations enabled in Eclipse by going to Window->Preferences and then General->Appearance->Label Decorations. This describes the set of decorations, but unfortunately not a picture of what the icon looks like (silly oversight IMO). Still, you might find it useful for seeing what the possibilities are.

For the subversive plugin for Eclipse Neon navigate to Window:Preferences:Team:SVN:Label Decorations, which will show you options and a preview like this: Label Decorations Dialog

If you are using CDT, this help page may help. Unfortunately, it does not display the icon decorations.