Meaning of netbeans ide navigator icons?

What are the meanings of the icons displayed in the Netbeans IDE navigator? Is there a legend posted somewhere online? I did google before asking, thank yo开发者_如何学编程u.

Here's a screenshot:

• Open the online help (Help -> Help Contents)
• Click on the "Search" tab
• Type "icon"
• Hit enter
• The first topic in the result ("Java File and Object Node Icons") lists all icons used in the IDE

Here is a screenshot of the online help:

Maybe this help is not available in your edition as you seem to be using PHP (which you could have told us from the beginning)

Oracle has put the NetBeans help online, so the icons can be viewed here as well:
http://docs.oracle.com/cd/E50453_01/doc.80/e50452/work_java_code.htm#r1c1-t5