Eclipse for Java Developers. Navigation and editing


Watching with their friends, who recently started to learn programming or switched to Eclipse from another IDE, I often notice that they almost do not use auxiliary tools in the development environment. They either do not know about them at all, or do not understand what practical benefits they can bring.
This article is intended mainly for beginners to work with Eclipse. But in the process of writing the article I learned about a few simple and convenient tools, which two years of active development never used.
In this article we will focus on navigation and editing.
Inside the screenshots.

The main benefit of these instruments is manifested when using hotkeys, I made the following table:

Navigation
the the the the the the the the the the the the the the the the the the the
Description
Ctrl+F
 ⌘+F
 Simple search/replace
Ctrl+H
 Ctrl+H
 Advanced search/replace
Ctrl+Shift+R
 ⌘+⇧+R
 Open resource
Ctrl+Shift+T
 ⌘+⇧+T
 Open logical structure(Class)
Ctrl+Shift+G
 ⌘+⇧+G
 to Find the occurrences of a variable, method, class
F4
 F4
 Open menu hierarchie
Ctrl+LeftClick
 ⌘+LeftClick
 move to the implementation or definition of a class, function, variable
F3
 F3
 go to definition
Ctrl+T
 ⌘+T
 move to implement
Ctrl+L
 ⌘+L
 go to line number
Alt+( left right )
 ⌘+( [ ] )
 Move to previous/next viewing location in the editor
Ctrl+Q
 Ctrl+Q
 go to last edit
Ctrl+E
 ⌘+E
 Show list of opened editor files
Ctrl+F6 (Ctrl+Shift+F6)
 ⌘+F6 (⌘+⇧+F6)
 Next/previous editor
Ctrl+O
 ⌘+O
 Show the fields and methods of class
Ctrl+T
 ⌘+T
 Display a class hierarchy
F2
 F2
 View javadoc
Ctrl+Shift+(up | down)
 Ctrl+option+(up | down)
 go to next/previous method
Editing
the the the the the the the the the the the the the the
Description
Ctrl+Space
 Ctrl+Space
 Completion
Ctrl+1
 ⌘+1
 the Possible actions
Ctrl+Shift+O
 ⌘+⇧+O
 Organization of the import packages
Ctrl+Shift+F
 ⌘+⇧+F
 autoformatting of code
Shift+Alt+S
 ⇧+option+S
 Menu code generation
Shift+Alt+T
 ⇧+option+T
 Menu refactoring
Shift+Alt+R
 ⇧+option+R
 Rename a variable, method, class
Shift+Alt+M
 ⌘+option+M
 Highlighting of the code in a separate method
Ctrl+Alt+(up|down)
 ⌘+option+(up|down)
 Duplication
Alt+(up|down)
 option+(up|down)
 Move line
Ctrl+/ Ctrl+7
 ⌘+/ ⌘+7
 single line comment
Ctrl+Shift+/
 ⌘+⇧+/
 Multiline comment
Ctrl+D
 ⌘+D
 Delete row, or a selection

Let's review each tool in more detail:

the

Simple search/replace


Ctrl+F⌘+F


This tool is present in many text editors. Provides the ability to find the desired occurrence of the text in the current document. And, if necessary, quickly replace with other text.
You can search using regular expressions, which can be used to create a complex search, however, is rarely used for searching on a single class.
If you select text and apply this tool — the selected text is immediately inserted in the search box.
Application:
— Quick jump to the desired part of the code;
— Replacing one word with another. If you need to write two functions that are identical in logical structure, but work with different collections, faster to write one function, to copy and make a replacement.

the

Advanced search/replace


Ctrl+HCtrl+H



This tool has expands the possibilities, which were discussed earlier.
Main features:
— search across all projects, not just one;
— possible full-text search and typed;
— when a large number of files for full text search takes a lot of time.
Application:
To find the occurrences of the text or in all projects.

the

edit resource


Ctrl+Shift+R⌘+⇧+R



Application:
Rapid discovery of the data file or a class.

the

Open logical structure(Class)


Ctrl+Shift+T⌘+⇧+T



You can enter only capital letters of the class. For example, to find class AbstractDogFactory enough to enter ADF.
You can also use *.

Application:
Quick opening the file with the class. Other files are ignored.

the

to Find the occurrences of a variable, method, class


Ctrl+Shift+G⌘+⇧+G



For the selected item is use for all projects.
Application:
Much faster than a conventional search. Just select the item to apply the tool and on the screen the list of places where this element is used.

the

Open menu hierarchie


F4F4



the

to Proceed to the implementation or definition of a class, function, variable


Ctrl+LeftClick⌘+LeftClick

While holding the Ctrl key left click the mouse on the element produces goes to its definition or implementation.
Application:
— easy to detect where the declared variable.
— jump to the implementation class or method.

the

go to definition


F3F3

Go to definition of item on which the cursor is positioned.

the

to Go to the implementation



The transition to the implementation of the element on which the cursor is positioned.

the

jump to line number


Ctrl+L⌘+L

Go to the line with the given number.
Application:
At interaction programmers to specify where in the code — call file and line.

the

Move to previous/next viewing location in the editor


Alt+( left right )⌘+( [ ] )

Returns to the previous/next place where you viewed the source code.
Application:
With the deepening of the implementation of one function or class, and return back.

the

go to last edit location


Ctrl+QCtrl+Q

Returns to the previous place where the edited source code.
Application:
A quick return to the work place.

the

Show list of opened editor files


Ctrl+E⌘+E



Application:
Quick switch between files.

the

Next/previous editor


Ctrl+F6 (Ctrl+Shift+F6)⌘+F6 (⌘+⇧+F6)



These shortcuts are not always convenient, so it makes sense to reassign them for example on Ctrl+Tab / Ctrl+Shift+Tab
To quickly switch suitable: Ctrl+Page Up/Page Down — Linux/Windows. Ctrl+Fn+Up/Down — OS X

the

Show fields and class methods


Ctrl+O⌘+O



Pressing hotkeys in the list add methods of parent class
Application:
— rapid assessment of the class structure;
— quick navigation to the desired method.

the

Show class hierarchy


Ctrl+T⌘+T



Pressing: expands the hierarchy in the opposite direction and shows the implemented interfaces.

Application:
Jump to the parent class.

the

View javadoc


F2F2



the

jump to next/previous method


Ctrl+Shift+(up | down)Ctrl+option+(up | down)

the

Autocompletion


Ctrl+SpaceCtrl+Space (conflicts with Spotlight)

The tool allows not to write the full names of functions, classes and variables, and only part of them, the programmer chooses the completion of the proposed.
However, many do not know some of the features of auto-completion in eclipse:
— if you select autopanne press Ctrl+Enter instead of Enter, the word to the right of the cursor will be replaced with avtomobilnoe.
— auto-completion works for the new variables:
if you have written

the 
 Point2D

and call completion, you will receive

the 
 Point2D point2d

— in eclipse, there are templates to quickly write:

the 
 syso

get

the 
 System.out.println();

Most popular templates:
— syso
— for
— while
— switch
— catch
View all templates and add your own in the settings in the tab "Templates".

the

Possible actions


Ctrl+1⌘+1

In my opinion the most useful tool in the process of writing code.
On the basis of what line the cursor is positioned and whether the text is selected, eclipse suggests possible changes and additions.
Examples of tools:
— create zagrosek to implement the interface methods or abstract class.

the 
public class Run implements Runnable {

}

steps on line name of class

the 
public class Run implements Runnable {

@Override
public void run() {
// TODO Auto-generated method stub 
}

}


— create new methods
If the current part of the code needed for a method, and it does not exist.

the 
 boolean success = isSuccess();

creates method

the 
 
private boolean isSuccess() {

// TODO Auto-generated method stub
return false;
}


— declaring variables
If you want to use the result of function

the 
 isSuccess();

declares a variable with the correct name

the 
 boolean success = isSuccess();


— allocation of constants
If the code inside is the figure or the text that you want to make a constant, vedelem it and apply the tool:

the 
 String success = "success";


the 
 private static final String SUCCESS = "success";


the

Organization of the import packages


Ctrl+Shift+O⌘+⇧+O

Remove imports of unused packages and add missing.

the

autoformatting of code


Ctrl+Shift+F⌘+⇧+F

Bringing the code in readable form:
— making the right tab.
— adds/removes whitespace;
— removes excess indentation;
— limits the length of the string — wraps text to the next different row.
Works for just the selected piece of code or an entire class.
Application:
Sometimes faster to write poorly formatted function and press the hotkeys than to write beautifully.

the

Menu generation code


Shift+Alt+S⇧+option+S

Auto — generate get and set methods.
placeholder for overridden and implemented functions;
— the hashcode and equals;
— toString;
constructor.
Application:
Do not waste time on standard methods if their implementation is not specific.

the

Menu refactoring


Shift+Alt+T⇧+option+T



the

Renaming a variable, method, class


Shift+Alt+R⇧+option+R

Rename the highlighted method. Thanks to the refactoring method will be renamed throughout the project.
the

reserving a portion of the code in a separate method


Shift+Alt+M⇧+option+M



The allocation of the selected part to a new method. All possible duplicates of this pieces of code in this class is automatically replaced with the call to the new method.

the

Duplicate row


Ctrl+Alt+(up|down)⌘+⌥+(up|down)

Application:
If the next line would be similar to current — faster to copy the current one and modify it than to write again.

the

Transport


Alt+(up|down)⌥+(up|down)

Application:
Quick transfer of the code, without having to copy and paste.

the

single line comment


Ctrl+/ Ctrl+7⌘+/ ⌘+7

the

Multiline comment


Ctrl+Shift+/⌘+⇧+/ (conflicts with the system hot key for Help)

When using the commented code, comments are removed.

the

to Delete a line or selection


Ctrl+D⌘+D

UPDATE: Fixed and completed the article.
Many thanks arturphoenix,AgentSIB,mishadoff,mdcool,Lihonosov,Aivean,anoshenko,lany,abusalimov,bimeg, netslow,majus for comments and additions.
Some instruments are indirectly related to navigation and editing, so I did not include them in the article, but I will try to include them in the next.
Article based on information from habrahabr.ru

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