eclipse中的提醒分别代表什么_J2SE

eclipse中的提示分别代表什么
如图圈出的图案，我大致能猜出一些代表类名一些代表接口，还有呢？有没有相关的帮助文档？？？

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引用:

Mars: http://help.eclipse.org/mars/index.jsp?topic=/org.eclipse.jdt.doc.user/reference/ref-icons.htm
Luna: http://help.eclipse.org/luna/index.jsp?topic=/org.eclipse.jdt.doc.user/reference/ref-icons.htm
Kepler: http://help.eclipse.org/kepler/index.jsp?topic=/org.eclipse.jdt.doc.user/reference/ref-icons.htm
Juno: http://help.eclipse.org/juno/index.jsp?topic=/org.eclipse.jdt.doc.user/reference/ref-icons.htm
Helios: http://help.eclipse.org/helios/index.jsp?topic=/org.eclipse.jdt.doc.user/reference/ref-icons.htm

Mars: MARS
Luna: LUNA
Kepler: http://help.eclipse.org/kepler/index.jsp?topic=/org.eclipse.jdt.doc.user/reference/ref-icons.htm
Juno: http://help.eclipse.org/juno/index.jsp?topic=/org.eclipse.jdt.doc.user/reference/ref-icons.htm
Helios: http://help.eclipse.org/helios/index.jsp?topic=/org.eclipse.jdt.doc.user/reference/ref-icons.htm