Java editor

Java editor

The following Java editor preferences can be set on this page:

Appearance
Syntax
Code Assist
Problem Indication

Appearance

Appearance specifies the Java editor's appearance.

Appearance

Option

Description

Default

Displayed tab width

Specifies how wide tabs are displayed in units of spaces.

4

Print margin column

Specifies the column after which the print margin is displayed.

To display the print margin, enable the option Show print margin, the preference Appearance color options specifies the color of the print margin.

80

Synchronize outline selection on cursor move

If enabled, the Outline view always selects the Java element enclosing the cursor in the Java editor.

Off

Show overview ruler

If enabled, the overview ruler on the right border of the Java editor is displayed and shows problems of the whole visible document.

On

Show line numbers

If enabled, the vertical ruler on the left border of the Java editor displays line numbers of the visible document.

The color of line numbers is specified with Appearance color options.

Off

Highlight matching brackets

If enabled, whenever the cursor is next to a parenthesis, bracket or curly braces, its opening or closing counter part is highlighted.

The color of the bracket highlight is specified with Appearance color options.

On

Highlight current line

If enabled, the background of the current line of the cursor is highlighted.

The color of the current line background is specified with Appearance color options.

On

Show print margin

If enabled, the print margin is displayed.

The preferences Print margin column and Appearance color options determine the position and color of the print margin.

Off

Appearance color options

The colors of various Java editor appearance features are specified here.

Line number foreground

The color of line numbers.

Matching brackets highlight

The color of brackets highlight.

Current line highlight

The color of current line highlight.

Print margin

The color of the print margin.

Find scope

The color of find scope.

Linked position

The color of linked positions used in code assist.

Link

The color of a link.

default colors

Syntax

Syntax specifies how Java source code is rendered.

Syntax

Option

Description

Default

Background color

System default:

The default background color given by the operating system.

Custom:

A user defined background color.

System default

Foreground

The following Java source fragments can be rendered with different color and style:

Multi-line comment

Comments of the form '/* ... */'

Single-line comment

Comments starting with '//'

Keywords

All Java keywords.

Strings

Java strings and characters, surrounded by single and double quotes

Others

Default Java source code

Task tags

Task tags in comments

Javadoc keywords

Keywords used in Javadoc, starting with '@'

Javadoc HTML tags

HTML tags used in Javadoc s

Javadoc links

{@link reference} tag

Javadoc others

Default Javadoc text

default colors and styles

Preview

Displays the preview of a Java source code respecting the current colors and styles.

n/a

Code assist

Code Assist specifies the behaviour and appearance of code assist.

Code Assist

Option

Description

Default

Completion inserts/Completion overwrites

If Completion inserts is on, the completion text is inserted at the caret position, so it never overwrites any existing text.
If Completion overwrites is on, the completion text replaces the characters following the caret position until the end of the word.

Completion inserts

Insert single proposals automatically

If enabled, code assist will choose and insert automatically single proposals.

On

Show only proposals visible in the invocation context

If enabled, the Java element proposals are limited by the rules of visibility. For example, private field proposals of other classes would not be displayed.

On

Present proposals in alphabetical order

If enabled, the proposals are sorted in alphabetical order.

Off

Automatically add import instead of qualified name

If enabled, type proposals which are in other packages will invoke the addition of the corresponding import declaration. Otherwise, the type will be inserted fully qualified.

On

Fill argument names on method completion

If enabled, choosing a method proposal will additionally insert the method's argument names as specified in its declaration.

Off

Enable auto activation

If enabled, code assist can be invoked automatically.

The condition for automatic invocation is specified with the preferences Auto activation delay, Auto activation triggers for Java and Auto activation triggers for Javadoc.

On

Auto activation delay

If the time starting when an auto activation trigger character is encountered until a new character is typed exceeds the auto activation delay, code assist is invoked.
500

Auto activation triggers for Java

If one of the trigger characters is typed inside Java source code (but not inside a Javadoc comment) and no other character is typed before the auto activation delay times out, the code assist is invoked.

'.'

Auto activation triggers for Javadoc

If one of the trigger characters is typed inside a Java doc and no other character is typed before the auto activation delay times out, the code assist is invoked.

'@'

Code assist color options

The colors used for the following code assist UI elements:

Completion proposal background

The background color of the completion proposal window

Completion proposal foreground

The foreground color of the completion proposal window

Method parameter background

The background color of the parameter window

Method parameter foreground

The foreground color of the parameter window

Completion overwrite background

The background color of the completion overwrite window

Completion overwrite foreground

The foreground color of the completion overwrite window

default colors

Annotations

Annotations specifies when and how annotations are displayed.

Annotations

Option

Description

Default

Analyze annotations while typing

If enabled, annotations are updated as the user types. Otherwise, annotations aren't updated until the Java file is compiled.

On

Indicate annotations solvable with Quick Fix in vertical ruler

Displays a light bulb on the vertical ruler on the left border of the Java editor for every annotation solvable with Quick Fix.

On

Annotation presentation

For every type of annotation you can specify

whether the annotation is shown in text, or in the overview ruler, or in both
in what color the annotation is rendered

Java Editor

Using the Java editor

Java editor Code Formatter preferences Outline view for Java Java Content Assist Quick Fix

Option	Description	Default
Displayed tab width	Specifies how wide tabs are displayed in units of spaces.	4
Print margin column	Specifies the column after which the print margin is displayed. To display the print margin, enable the option Show print margin, the preference Appearance color options specifies the color of the print margin.	80
Synchronize outline selection on cursor move	If enabled, the Outline view always selects the Java element enclosing the cursor in the Java editor.	Off
Show overview ruler	If enabled, the overview ruler on the right border of the Java editor is displayed and shows problems of the whole visible document.	On
Show line numbers	If enabled, the vertical ruler on the left border of the Java editor displays line numbers of the visible document. The color of line numbers is specified with Appearance color options.	Off
Highlight matching brackets	If enabled, whenever the cursor is next to a parenthesis, bracket or curly braces, its opening or closing counter part is highlighted. The color of the bracket highlight is specified with Appearance color options.	On
Highlight current line	If enabled, the background of the current line of the cursor is highlighted. The color of the current line background is specified with Appearance color options.	On
Show print margin	If enabled, the print margin is displayed. The preferences Print margin column and Appearance color options determine the position and color of the print margin.	Off
Appearance color options	The colors of various Java editor appearance features are specified here. Line number foreground The color of line numbers. Matching brackets highlight The color of brackets highlight. Current line highlight The color of current line highlight. Print margin The color of the print margin. Find scope The color of find scope. Linked position The color of linked positions used in code assist. Link The color of a link.	default colors

Option	Description	Default
Background color	System default: The default background color given by the operating system. Custom: A user defined background color.	System default
Foreground	The following Java source fragments can be rendered with different color and style: Multi-line comment Comments of the form '/* ... */' Single-line comment Comments starting with '//' Keywords All Java keywords. Strings Java strings and characters, surrounded by single and double quotes Others Default Java source code Task tags Task tags in comments Javadoc keywords Keywords used in Javadoc, starting with '@' Javadoc HTML tags HTML tags used in Javadoc s Javadoc links {@link reference} tag Javadoc others Default Javadoc text	default colors and styles
Preview	Displays the preview of a Java source code respecting the current colors and styles.	n/a

Option	Description	Default
Completion inserts/Completion overwrites	If Completion inserts is on, the completion text is inserted at the caret position, so it never overwrites any existing text. If Completion overwrites is on, the completion text replaces the characters following the caret position until the end of the word.	Completion inserts
Insert single proposals automatically	If enabled, code assist will choose and insert automatically single proposals.	On
Show only proposals visible in the invocation context	If enabled, the Java element proposals are limited by the rules of visibility. For example, private field proposals of other classes would not be displayed.	On
Present proposals in alphabetical order	If enabled, the proposals are sorted in alphabetical order.	Off
Automatically add import instead of qualified name	If enabled, type proposals which are in other packages will invoke the addition of the corresponding import declaration. Otherwise, the type will be inserted fully qualified.	On
Fill argument names on method completion	If enabled, choosing a method proposal will additionally insert the method's argument names as specified in its declaration.	Off
Enable auto activation	If enabled, code assist can be invoked automatically. The condition for automatic invocation is specified with the preferences Auto activation delay, Auto activation triggers for Java and Auto activation triggers for Javadoc.	On
Auto activation delay	If the time starting when an auto activation trigger character is encountered until a new character is typed exceeds the auto activation delay, code assist is invoked.	500
Auto activation triggers for Java	If one of the trigger characters is typed inside Java source code (but not inside a Javadoc comment) and no other character is typed before the auto activation delay times out, the code assist is invoked.	'.'
Auto activation triggers for Javadoc	If one of the trigger characters is typed inside a Java doc and no other character is typed before the auto activation delay times out, the code assist is invoked.	'@'
Code assist color options	The colors used for the following code assist UI elements: Completion proposal background The background color of the completion proposal window Completion proposal foreground The foreground color of the completion proposal window Method parameter background The background color of the parameter window Method parameter foreground The foreground color of the parameter window Completion overwrite background The background color of the completion overwrite window Completion overwrite foreground The foreground color of the completion overwrite window	default colors

Option	Description	Default
Analyze annotations while typing	If enabled, annotations are updated as the user types. Otherwise, annotations aren't updated until the Java file is compiled.	On
Indicate annotations solvable with Quick Fix in vertical ruler	Displays a light bulb on the vertical ruler on the left border of the Java editor for every annotation solvable with Quick Fix.	On
Annotation presentation	For every type of annotation you can specify whether the annotation is shown in text, or in the overview ruler, or in both in what color the annotation is rendered