Keyboard shortcuts Eclipse

Debug Mode in Eclipse for Source Not Found
"window->Preferences->Java->Debug" and disable the "suspend execution of uncaught exceptions"
http://stackoverflow.com/questions/10121214/has-myeclipse-implicit-breakpoint-in-debugging-mode-in-class-urlclasspath

If I'm reading you right, you want to specify some classes that you 
don't want to step into? I think what you want is...

Window -> Preferences -> Java -> Debug -> Step Filtering
http://www.eclipse.org/forums/index.php/t/101609/

Task Windows (Windows>Show View>Tasks, find Todo in Eclipse)
See the following on how to change configure Task Windows
http://www.mooreds.com/wordpress/archives/446

Add shortcut key to bookmarks
Windows>preference>Key>search for "add bookmark"
set alt+b (in windows)
http://stackoverflow.com/questions/3141493/bookmarks-in-eclipse-set-and-go-using-hotkeys-do-they-exist

Adding bookmark / Open bookmark windows

http://sandarenu.blogspot.sg/2008/02/using-bookmarks-in-eclipse.html

Finding classes/packages (ctrl+shift+h)

http://stackoverflow.com/questions/8944994/how-to-find-package-by-name-in-eclipse

Find usage (ctrl+shift+g)

Find type declaration (ctrl+g)

Eclipse Shortcut (alt+left arrow)

Generate Constructor (Alt+Shift+S, O)
http://www.eclipseonetips.com/2010/03/08/generate-class-constructors-in-eclipse-based-on-fields-or-superclass-constructors/

includes import
ctrl+shift+o

Open file in explorer
http://basti1302.github.io/startexplorer/

Formatting code
ctrl+shift+f

Formatting code upon save
http://www.eclipseonetips.com/2009/12/13/automatically-format-and-cleanup-code-every-time-you-save/

Automatic put semicolon at the end
http://www.eclipseonetips.com/2010/02/22/place-a-semicolon-at-the-end-of-a-java-statement-in-eclipse/

Duplicate Lines

Ctrl-Alt-Down: copies current line or selected lines to below

Ctrl-Alt-Up:: copies current line or selected lines to above

Ctrl-Shift-L: brings up a List of shortcut keys

Rename variable
ALT+SHIFT+R 


Time different

long beginTime = System.currentTimeMillis();

//Some operations. Let us asssume some database operations etc. which are time consuming.

//

long endTime = System.currentTimeMillis();

long difference = endTime - beginTime;

I prefer visual presentation:

╔══════════════╦═════════════════════╦═══════════════════╦══════════════════════╗
║   Property   ║       HashMap       ║      TreeMap      ║     LinkedHashMap    ║
╠══════════════╬═════════════════════╬═══════════════════╬══════════════════════╣
║              ║  no guarantee order ║ sorted according  ║                      ║
║   Order      ║ will remain constant║ to the natural    ║    insertion-order   ║
║              ║      over time      ║    ordering       ║                      ║
╠══════════════╬═════════════════════╬═══════════════════╬══════════════════════╣
║  Get/put     ║                     ║                   ║                      ║
║   remove     ║         O(1)        ║      O(log(n))    ║         O(1)         ║
║ containsKey  ║                     ║                   ║                      ║
╠══════════════╬═════════════════════╬═══════════════════╬══════════════════════╣
║              ║                     ║   NavigableMap    ║                      ║
║  Interfaces  ║         Map         ║       Map         ║         Map          ║
║              ║                     ║    SortedMap      ║                      ║
╠══════════════╬═════════════════════╬═══════════════════╬══════════════════════╣
║              ║                     ║                   ║                      ║
║     Null     ║       allowed       ║    only values    ║       allowed        ║
║ values/keys  ║                     ║                   ║                      ║
╠══════════════╬═════════════════════╩═══════════════════╩══════════════════════╣
║              ║   Fail-fast behavior of an iterator cannot be guaranteed       ║
║   Fail-fast  ║ impossible to make any hard guarantees in the presence of      ║
║   behavior   ║           unsynchronized concurrent modification               ║
╠══════════════╬═════════════════════╦═══════════════════╦══════════════════════╣
║              ║                     ║                   ║                      ║
║Implementation║      buckets        ║   Red-Black Tree  ║    double-linked     ║
║              ║                     ║                   ║       buckets        ║
╠══════════════╬═════════════════════╩═══════════════════╩══════════════════════╣
║      Is      ║                                                                ║
║ synchronized ║              implementation is not synchronized                ║
╚══════════════╩════════════════════════════════════════════════════════════════╝

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