Comment / uncomment line or selection ( adds '//' )

`Ctrl` + `/`

All hotkeys for Eclipse Helios (Windows)

Manage Files and Projects Create new project using the Wizard	`Ctrl` + `N`
Manage Files and Projects Create new project, file, class, etc.	`Ctrl` + `Alt` + `N`
Manage Files and Projects Open project, file, etc.	`Alt` + `F` , then `.`
Manage Files and Projects Open Resource (file, folder or project)	`Ctrl` + `Shift` + `R`
Manage Files and Projects Show and access file properties	`Alt` + `Enter`
Manage Files and Projects Save current file	`Ctrl` + `S`
Manage Files and Projects Save all files	`Ctrl` + `Shift` + `S`
Manage Files and Projects Close current file	`Ctrl` + `W`
Manage Files and Projects Close all files	`Ctrl` + `Shift` + `W`
Manage Files and Projects Refresh content of selected element with local file system	`F5`
Editor Window Jump to Editor Window	`F12`
Editor Window Switch to next editor / switch to previous editor	`Ctrl` + `Page Down` / `Ctrl` + `Page Up`
Editor Window Maximize or un-maximize current Editor Window (also works for other Windows)	`Ctrl` + `M`
Editor Window Show list of open Editors. Use arrow keys and enter to switch	`Ctrl` + `E`
Editor Window Show list of open Editors. Similar to ctrl+e but switches immediately upon release of ctrl	`Ctrl` + `F6` / `Ctrl` + `Shift` + `F6`
Editor Window Go to previous / go to next Editor Window	`Alt` + `Arrow Left` / `Alt` + `Arrow Right`
Editor Window Open Editor Window Option menu	`Alt` + `-`
Editor Window Show view menu (features available on left vertical bar: breakpoints, bookmarks, line numbers, …)	`Ctrl` + `F10`
Editor Window Show or hide line numbers	`Ctrl` + `F10` , then `n`
Editor Window Show or hide the diff column on the left (indicates changes since last save)	`Ctrl` + `Shift` + `Q`
Editor Window Zoom text in/ out	`Ctrl` + `Shift` + `+` / `-`
Navigate in Editor Jump to beginning / jump to end of indention. Press home twice to jump to beginning of line	`Home` / `End`
Navigate in Editor Jump to beginning / jump to end of source	`Ctrl` + `Home` / `End`
Navigate in Editor Jump one word to the left / one word to the right	`Ctrl` + `Arrow Right` / `Arrow Left`
Navigate in Editor Jump to previous / jump to next method	`Ctrl` + `Shift` + `Arrow Down` / `Arrow Up`
Navigate in Editor Jump to Line Number. To hide/show line numbers, press ctrl+F10 and select 'Show Line Numbers'	`Ctrl` + `L`
Navigate in Editor Jump to last location edited	`Ctrl` + `Q`
Navigate in Editor Jump to next / jump to previous compiler syntax warning or error	`Ctrl` + `.` / `Ctrl` + `,`
Navigate in Editor With a bracket selected: jump to the matching closing or opening bracket	`Ctrl` + `Shift` + `P`
Navigate in Editor Collapse / Expand current method or class	`Ctrl` + `[` + `]` / `Ctrl` + `-` on numeric keyboard
Navigate in Editor Collapse / Expand all methods or classes	`Ctrl` + `[` / `]` / `Ctrl` + `*` on numeric keyboard
Navigate in Editor Scroll Editor without changing cursor position	`Ctrl` + `Arrow Down` / `Ctrl` + `Arrow Up`
Navigate in Editor Next Sub-Tab / Previous Sub-Tab	`Alt` + `Page Up` / `Alt` + `Page Down`
Select Text Expand selection by one character to the left / to the right	`Shift` + `Arrow Right` / `Arrow Left`
Select Text Expand selection to next / previous word	`Ctrl` + `Shift` + `Arrow Right` / `Arrow Left`
Select Text Expand selection by one line down / one line up	`Shift` + `Arrow Down` / `Arrow Up`
Select Text Expand selection to end / to beginning of line	`Shift` + `End` / `Home`
Select Text Select all	`Ctrl` + `A`
Select Text Expand selection to current element (e.g. current one-line expression or content within brackets)	`Alt` + `Shift` + `Arrow Up`
Select Text Expand selection to next / previous element	`Alt` + `Shift` + `Arrow Left` / `Arrow Right`
Select Text Reduce previously expanded selection by one step	`Alt` + `Shift` + `Arrow Down`
Edit Text Cut, copy and paste	`Ctrl` + `C` / `Ctrl` + `X` / `Ctrl` + `V`
Edit Text Undo last action	`Ctrl` + `Z`
Edit Text Redo last (undone) action	`Ctrl` + `Y`
Edit Text Delete Line	`Ctrl` + `D`
Edit Text Move current line or selection up or down	`Alt` + `Arrow Up` / `Arrow Down`
Edit Text Duplicate current line or selection up or down	`Ctrl` + `Alt` + `Arrow Up` / `Ctrl` + `Alt` + `Arrow Down` /
Edit Text Delete next word	`Ctrl` + `Delete`
Edit Text Delete previous word	`Ctrl` + `Backspace`
Edit Text Enter line below current line	`Shift` + `Enter`
Edit Text Enter line above current line	`Shift` + `Ctrl` + `Enter`
Edit Text Switch between insert and overwrite mode	`Insert`
Edit Text Change selection to all lower case	`Shift` + `Ctrl` + `Y`
Edit Text Change selection to all upper case	`Shift` + `Ctrl` + `X`
Search and Replace Open find and replace dialog	`Ctrl` + `F`
Search and Replace Find previous / find next occurrence of search term (close find window first)	`Ctrl` + `K` / `Ctrl` + `Shift` + `K`
Search and Replace Search Workspace (Java Search, Task Search, and File Search)	`Ctrl` + `H`
Search and Replace Incremental search forward / backwards. Type search term after pressing ctrl+j, there is now search window	`Ctrl` + `J` / `Ctrl` + `Shift` + `J`
Search and Replace Open a resource search dialog to find any class	`Ctrl` + `Shift` + `O`
Indentions and Comments Increase / decrease indent of selected text	`Tab` / `Shift` + `Tab`
Indentions and Comments Correct indention of selected text or of current line	`Ctrl` + `I`
Indentions and Comments Autoformat all code in Editor using code formatter	`Ctrl` + `Shift` + `F`
Indentions and Comments Comment / uncomment line or selection ( adds '//' )	`Ctrl` + `/`
Indentions and Comments *Add Block Comment around selection ( adds '/... /' )**	`Ctrl` + `Shift` + `/`
Indentions and Comments Remove Block Comment	`Ctrl` + `Shift` + `\`
Indentions and Comments Add Element Comment ( adds '/ ... /')*	`Alt` + `Shift` + `J`
Editing Source Code Opens Content Assist (e.g. show available methods or field names)	`Ctrl` + `Space`
Editing Source Code Open Quick Fix and Quick Assist	`Ctrl` + `1`
Editing Source Code Propose word completion (after typing at least one letter). Repeatedly press alt+/ until reaching correct name	`Alt` + `/`
Editing Source Code Deactivate or activate Smart Insert Mode (automatic indention, automatic brackets, etc.)	`Ctrl` + `Shift` + `Insert`
Code Information Show code outline / structure	`Ctrl` + `O`
Code Information Open class, method, or variable information (tooltip text)	`F2`
Code Information Open Declaration: Jump to Declaration of selected class, method, or parameter	`F3`
Code Information Open Type Hierarchy window for selected item	`F4`
Code Information Show / open Quick Type Hierarchy for selected item	`Ctrl` + `T`
Code Information Open Type in Hierarchy	`Ctrl` + `Shift` + `T`
Code Information Open Call Hierarchy	`Ctrl` + `Alt` + `H`
Code Information Find occurrences of expression in current file	`Ctrl` + `Shift` + `U`
Code Information Open Declaration or Implementation	`Ctrl` +move over method
Refactoring Rename selected element and all references	`Alt` + `Shift` + `R`
Refactoring Move selected element to other class or file (With complete method or class selected)	`Alt` + `Shift` + `V`
Refactoring Change method signature (with method name selected)	`Alt` + `Shift` + `C`
Refactoring Extract selection to method	`Alt` + `Shift` + `M`
Refactoring Extract local variable: Create and assigns a variable from a selected expression	`Alt` + `Shift` + `L`
Refactoring Inline selected local variables, methods, or constants if possible (replaces variable with its declarations/ assignment and puts it directly into the statements)	`Alt` + `Shift` + `I`
Run and Debug Save and launch application (run)	`Ctrl` + `F11`
Run and Debug Debug	`F11`
Run and Debug Step Into function	`F5`
Run and Debug Next step (line by line)	`F6`
Run and Debug Step out	`F7`
Run and Debug Skip to next Breakpoint	`F8`
The Rest Switch forward / backward between views (panels). Useful for switching back and forth between Package Explorer and Editor.	`Ctrl` + `F7` / `Ctrl` + `Shift` + `F7`
The Rest Switch forward / backward between perspectives	`Ctrl` + `F8` / `Ctrl` + `Shift` + `F8`
The Rest Print	`Ctrl` + `P`
The Rest Open Eclipse Help	`F1`
The Rest Show Context Menu right click with mouse	`Shift` + `F10`
Team (SVN Subversive) Synchronize with Repository	`Ctrl` + `Alt` + `S`
Team (SVN Subversive) Commit	`Ctrl` + `Alt` + `C`
Team (SVN Subversive) Update	`Ctrl` + `Alt` + `U`
Team (SVN Subversive) Update to Revision	`Ctrl` + `Alt` + `D`
Team (SVN Subversive) Merge	`Ctrl` + `Alt` + `E`
Team (SVN Subversive) Show Properties	`Ctrl` + `Alt` + `T`
Team (SVN Subversive) Add to svn:ignore	`Ctrl` + `Alt` + `I`