|
Ctrl+1
|
Quickfix
|
|
Ctrl+3
|
Open "Quick Access" search
|
|
Ctrl+␣
|
Content Assist
|
|
Alt+⇧Shift+Z
|
Surround with (do, for, if, try, ..)
|
|
Ctrl+Z
|
Undo
|
|
Ctrl+⇧Shift+Z
|
Redo
|
|
Ctrl+/
|
Comment / uncomment line or selection (adds '//')
|
|
Ctrl+⇧Shift+7
|
Add Block Comment around selection (adds '/... */')
|
|
Ctrl+⇧Shift+ß
|
Remove Block Comment
|
|
Alt+⇧Shift+J
|
Add Element Comment (adds '/** ... */' JavaDoc)
|
|
Ctrl+⇧Shift+Y
|
lowercase selected text
|
|
Ctrl+⇧Shift+X
|
uppercase selected text
|
|
Ctrl+D
|
Delete line
|
|
Ctrl+⇧Shift+Del
|
Delete until end of line
|
|
Ctrl+Del
|
Delete next element
|
|
Ctrl+⌫
|
Delete previous element
|
|
Ctrl+Alt+↓/↑
|
Copy line below/above
|
|
Alt+/
|
Propose word completion - after typing at least one letter. Repeatedly press until reaching correct name
|
|
Alt+⇧Shift+A
|
Column (block) selection, Multiline block editing
|
|
⇧Shift+Enter
|
Adds a blank line below the current line
|
|
Ctrl+⇧Shift+Enter
|
Adds a blank line above the current line
|
|
Alt+⇧Shift+S, R
|
Generate Getters and Setters
|
|
Alt+↑/↓
|
Move current line or selection up or down
|
|
Ctrl+←/→
|
Jump one word to the left / right
|
|
Ctrl+⇧Shift+↑/↓
|
Jump to previous / next method
|
|
Ctrl+L
|
Jump to Line Number. To hide/show line numbers, press Ctrl+F10 and select 'Show Line Numbers'
|
|
Ctrl+Q
|
Jump to last location edited
|
|
Ctrl+./,
|
Jump to next / previous warning or error
|
|
Ctrl+↑
|
Scroll up
|
|
Ctrl+↓
|
Scroll down
|
|
Ctrl+⇧Shift+P
|
Go to the matching bracket
|
|
Alt+⇧Shift+↑/↓
|
Select the previous / next syntactical element
|
|
Alt+⇧Shift+↑/↓/←/→
|
Extending / reducing the selection of the previous / next syntactical element
|
|
Alt+⇧Shift+↑
|
Expand selection to current element
|
|
Alt+⇧Shift+↓
|
Reduce previously expanded selection by one step
|
|
Ctrl+⇧Shift+T
|
Open Type
|
|
|
Ctrl+⇧Shift+H
|
Open Type In Hierarchy
|
|
|
Ctrl+⇧Shift+R
|
Open Resource
|
|
|
Ctrl+O
|
Show Outline (second press shows the inherited members)
|
|
|
F2
|
Open class, method or variable information (tooltip text)
|
|
|
F3
|
Open Declaration: Jump to Declaration of selected class, method or parameter
|
|
|
F4
|
Open Type Hierarchy window for selected item
|
|
|
Ctrl+T
|
Show Quick Type Hierarchy (toggles between supertypes and subtypes when pressed again)
|
|
|
Ctrl+U
|
Find occurrences of expression in current file
|
|
|
Ctrl+mouse over method
|
Open Declaration or Implementation
|
|
|
Ctrl+⇧Shift+L
|
List of shortcuts (depending on the context)
|
|
|
Ctrl+⇧Shift+␣
|
Method Parameter Hints
|
cursor is located at the parameter specification for method reference
|
|
Ctrl+⇧Shift+G
|
Search workspace for references to selected method or variable
|
|
|
Ctrl+G
|
Search workspace for declarations of to the item under the cursor
|
|
|
Ctrl+F
|
Quick search
|
|
|
Alt+↵
|
Show properties (in Package or Project Explorer)
|
|
|
Ctrl+⇧Shift+O
|
Organize Imports
|
|
Ctrl+⇧Shift+F
|
Format Source
|
|
Ctrl+I
|
Intend selected source
|
|
Ctrl+⇧Shift+M
|
Add Import / also static imports
|
|
Alt+⇧Shift+R
|
Rename Element
|
|
Ctrl+2, R
|
Rename locally (in file), faster than Alt+⇧Shift+R
|
|
Alt+⇧Shift+L
|
Extract to local variable
|
|
Alt+⇧Shift+M
|
Extract to method
|
|
Alt+⇧Shift+T
|
Opens the context-sensitive refactoring menu
|
|
Alt+⇧Shift+R
|
Rename
|
|
Alt+⇧Shift+V
|
Move
|
|
Alt+⇧Shift+C
|
Change Method Signature
|
|
Alt+⇧Shift+M
|
Extract Method
|
|
Alt+⇧Shift+L
|
Extract Local Variable
|
|
Alt+⇧Shift+I
|
Inline
|
|
F12
|
Jump to Editor Window
|
|
|
Ctrl+PgDn/PgUp
|
Next / previous Editor - in the order of their tabs in the editor area
|
|
|
Ctrl+M
|
Maximize or un-maximize current Editor Window
|
|
|
Ctrl+E
|
Show list of open Editors. Use arrow keys and enter to switch
|
|
|
Alt+←/→
|
Backward / Forward editor navigation history
|
|
|
Alt+-
|
Open Editor Window Option menu
|
|
|
Ctrl+F6
|
Next Editor - if released it immediately, Eclipse will take you to the last active editor
|
|
|
Ctrl+⇧Shift+F6
|
Previous Editor
|
|
|
Ctrl+E
|
Quick Switch Editor
|
|
|
Alt+F7
|
Multipage editor - next Page
|
|
|
Alt+⇧Shift+F7
|
Multipage editor - previous Page
|
|
|
Ctrl+-
|
Toogle Split Editor (Horizontal) - since Luna
|
old: Ctrl+_
|
|
Ctrl+<
|
Toogle Split Editor (Vertical) - since Luna
|
old: Ctrl+{
|
|
Ctrl+⇧Shift+"Num Keypad /"
|
Collapse all code blocks
|
|
|
Ctrl+⇧Shift+"Num Keypad *"
|
Open all code blocks
|
|
|
⇧Shift (and hover over element)
|
Show source (in tooltip)
|
settings: Window → Preferences → Java → Editor → Hovers
|
|
Reorder class members with Drag & Drop
|
Disable "Sort Order" - otherwise not possible
|
|
Automatic reordering: Select the class, Source → Sort Members
|
|
Alt+F5
|
Maven → Update Project...
|
|
Configure to view only warnings and errors associated with a particular resource or group of resources
|
Problems View - Configure Contents e.g. select "on any element in same project" to restrict to current selected project
|
|
test
|
Created test method
|
|
|
for
|
Creates for loop
|
|
|
new
|
Creates new instance
|
|
|
try
|
Creates try..catch
|
|
|
sysout, syserr, systrace
|
Creates System.out...
|
|
|
strf
|
Format string
|
|
|
if
|
if null/if not null
|
|
|
for
|
iterate over map
|
|
|
static_final
|
static final field
|
|
|
before
|
junit before method
|
|
|
after
|
junit after method
|
|
|
beforeclass
|
junit beforeclass method
|
|
|
afterclass
|
junit afterclass method
|
|
|
quote
|
surround selection with quotes
|
|
|
1. Import project Java formatter configuration
|
|
2. Download Checkstyle configuration file from sonar server and reference the config file as a file resource url
|
|
3. Download Findbugs configuration file from sonar server and add the config file under "include filter files"
|
|
4. Download PMD configuration file from sonar server and first "clear all" existing rules and then import the config file
|
|
Testing Support
|
||
|
Test Coverage
|
||
|
Source Code Analyzer
|
||
|
Ignore certain warnings with //NOSONAR or @SuppressWarnings("squid:S00112")
|
||
|
Refactoring
|
||
|
Subversion Eclipse Team Provider Plugin
|
||
|
use Subclipse instead of Subversive because it is much faster
|
||
|
Task based working
|
||
|
Maven integration
|
||
|
add needed m2e connectors. follow pom.xml hints/problems. e.g:
|
m2e project configurators for Eclipse WTP
|
|
|
m2e connector for build-helper-maven-plugin
|
||
|
m2e connector for the Eclipse JDT Compiler
|
||
|
m2e connector for the Maven Dependency Plugin
|
||
|
Groovy-Eclipse m2e integration
|
||
|
Decompiler
|
||
|
show "." files in package explorer
|
"Package Explorer → View Menu → Filters → uncheck .*" or "Package Explorer → Customize View… → Filters → uncheck .*"
|
|
|
Package Explorer Option "Link with editor"
|
Link file to package explorer
|
|
|
Favorites Imports
|
Windows → Preferences → Java → Editor → Content Assist → Favorites, New Type...
|
x¹
|
|
Show line numbers
|
Window → Preferences → General → Editors → Text Editors → "Show line numbers"
|
|
|
Show print margin
|
Window → Preferences → General → Editors → Text Editors → "Show print margin"
|
|
|
Paste multiline strings
|
Window → Preferences → Java → Editor → Typing → "Escape text when pasting into a string literal"
|
|
|
x²
|
||
|
x²
|
||
|
MoreUnit Configuration
|
Test source folder: "src/test/java"
|
|
|
Test Type: "Junit4"
|
||
|
uncheck "Use test-prefix for test-methods"
|
||
|
Rule for naming test files → Pattern: ${srcFile}(Test|IT|ITCase)
|
||
|
if you have legacy tests with Test prefix: Rule for naming test files → Pattern: (Test)${srcFile}(Test|IT|ITCase)
|
||
|
Formatter Options
|
Window → Preferences → Java → Code Style → Formatter → Off/On Tags for //@formatter:off and //@formatter:on
|
|
|
Check the Never join lines preference accessible on the Line Wrapping and the Comments tabs of the Java Formatter preference page
|
||
|
Improve Performance
|
Window → Preferences → Validation, Disable All
|
|
|
Add -Xverify:none to eclipse.ini
|
tell the VM not to validated all the .class files it is loading
|
|
|
Window → Preferences →General → Startup and Shutdown
|
remove plugins not needed
|
|
|
increase -Xms and -Xmx heap memory options (start and max) in eclipse.ini
|
e.g. -Xms512m -Xmx2048m
|
|
|
increase -XX:MaxPermSize option (if java < 1.8)
|
e.g. -XX:MaxPermSize=512m
|
|
|
Enable informative Eclipse Compiler Warnings
|
Window → Preferences → Java → Compiler → Errors/Warnings
|
set to Warning and keep sub checkboxes checked (if any)
|
|
Potential Programming problems
|
Potential resource leak
|
|
|
Unnecessary code
|
Value of parameter is not used
|
|
|
Unused type parameter
|
||
|
Unnecessary declaration of thrown exception
|
||
|
Unnecessary 'else' statement
|
||
|
Unnecessary cast of 'instanceof' operation
|
||
|
Generic types
|
Redundant type arguments (1.7 and higher)
|
|
|
Annotations
|
Unhandled token in '@SuppressWarnings' set to "Ignore"
|
|
|
Null analysis
|
Redundant null check
|
|
|
Window → Preferences → XML Files → Editor
|
Select "Indent using spaces" and set "Indentation Size: 4"
|
|
|
Window → Preferences → General → Editors → Text Editors
|
Set "Displayed tab width: 4" and select "Insert spaces for tabs"
|
|
|
Save Actions
|
Window → Preferences →Java →Editor → Save Actions
|
|
|
check "Perform the selected actions on save"
|
||
|
check "Format source code", "Format all lines"
|
||
|
check "Organize imports"
|
||
|
check "Additional actions" and add the following:
|
||
|
Code Style
|
• "Use blocks in if/while/for/do statements"
|
|
|
• Use lambda where possible
|
if you use Java >= 8
|
|
|
Add final modifier to private fields*
|
• Add final modifier to private fields
|
|
|
• Add final modifier to local parameter
|
||
|
• Add final modifier to local variables
|
||
|
Unused Code
|
• Remove unused imports
|
|
|
• Add missing '@Override' annotations
|
||
|
• Add missing '@Override' annotations to implementations of interface methods
|
||
|
• Add missing '@Deprecated' annotations
|
||
|
• Remove unnecessary casts
|
||
|
• Remove unnecessary '$NON-NLS$' tags
|
||
|
Limit maximum number of open editors
|
Window → Preferences → General → Editors
|
|
|
check "Close editors automatically"
|
||
|
choose value (e.g. 20) for "Number of opened editors before closing"
|
||
|
JDT Core/Null Analysis to avoid NPEs
|
Window → Preferences → Java → Compiler → Errors/Warnings, Section Null analysis
|
if you use Java < 8 (cannot use Optional) and cannot use Guava Optional e.g. for legacy projects
|
|
check "Enable annotation-based null analysis"
|
you can use the Eclipse annotations, the JSR-305 annotations (old), custom ones or the JSR-308 annotations from Checker Framework
|
|
|
Maven
|
Window → Preferences → Maven → User Interface
|
|
|
check "Open XML page in the POM editor by default"
|
Reason: show pom.xml source code is faster than loading the "Overview" tab all the time
|
|
|
JUnit
|
Window → Preferences → Java → JUnit enable "Add 'ea' to VM arguments when creating new JUnit launch configuration"
|
enable JVM assertions by default
|
|
Show heap memory status
|
Window → Preferences → General
|
enable "Show heap status"
|
|
Enable "Quick Diff"
|
Window → Preferences → General → Editors → Text Editors → Quick Diff
|
enable checkboxes and select correct reference source option
|
|
Refresh all Projects (with some closed in between)
|
In Package Explorer
|
Ctrl+A, F5
|
|
Use Working Sets for better performance
|
Package Explorer → open the drop-down menu → Select Working Set
|
|
|
If Ctrl+⇧Shift+R and Ctrl+⇧Shift+T does not reflect active Working Set check the small arrow on the top right of the dialogue to select Working Set
|
||
|
Maven dependency issues
|
try without eclipse project resolution
|
[Project] → Properties → Maven
|
|
uncheck "Resolve dependencies from Workspace projects" to check with jars from local
~/.m2 repository instead of eclipse projects within workspace/workingset |
||
|
clean projects
|
don't mix usage of maven CLI and m2e eclipse plugin
|
|
|
if mixed - make a
mvn eclipse:clean (CLI) and import again in eclipse |
||
|
Error message
The archive: <path_to_jar_file> which is referenced by the classpath, does not exist. |
find project with
.classpath file where old/wrong jar is referenced |
|
|
make a
mvn eclipse:clean (CLI) and import again in eclipse |
||
|
you can use this command to search for the projects referencing old jar:
find -name '.classpath' -exec grep -Hin 'example-1.2.3.jar' {} \; |
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