Download Javadoc to local folder and attach to Eclipse:
Window -> Preference -> Installed JREs -> [Select the JRE] -> Edit -> [Select all libraries] -> Javadoc Location -> [Browse, select the "api" folder] -> Validate
http://www.gnostice.com/nl_article.asp?id=209
http://help.eclipse.org/juno/index.jsp
Project Explorer - organize project according to logical group and view
Navigator - project file directory
Markers - error messages, etc.
Go to declaration - "ctrl" + click class name;
Type hierarchy - goto class declaration, press "F4" or right click -> Open Type Hierarchy
View Javadoc - highlight class, open Javadoc view see description of the class, click "open in browser" to show complete Javadoc, otherwise "Shirt-F2" open complete Javadoc directly;
Find matching brace - (1) place cursor after an opening or closing brace then double-click, or (2) place cursor after an opening or closing brace then press Ctrl+Shift+P or select Navigate >> Go To >> Matching Bracket, or (3) Window >> Preferences >> Java >> Editor. Select Highlight matching brackets.
Build Path: [project] -> Properties -> Java Build Path
File Association : Window / Preference -> (Left Pane) General -> Content Types
Rinzo XML Editor