SpaceVim/docs/layers/lang/java.md

title	description
SpaceVim lang#java layer	This layer is for Java development. All the features such as code completion, formatting, syntax checking, REPL and debug have be done in this layer.

Available Layers >> lang#java

• Description
• Feature
• Install
• Key bindings
  • Import key bindings
  • Generate key bindings
  • Code formatting
  • Maven
  • Jump
  • Inferior REPL process

Description

This layer is for Java development.

Feature

• code completion: autocomplete layer
• code formatting
• refactoring
• syntax checking: checkers layer
• REPL(need java8's jshell)
• debug: check out the debug layer

Install

To use this configuration layer, update custom configuration file with:

[[layers]]
  name = "lang#java"

Key bindings

Import key bindings

Key Bindings	Descriptions
<F4> (Insert/Normal)	Import class under cursor
SPC l I	Import missing classes
SPC l R	Remove unused classes
SPC l i	smart import class under cursor
Ctrl-j I (Insert)	Import missing classes
Ctrl-j R (Insert)	Remove unused classes
Ctrl-j i (Insert)	smart import class under cursor

Generate key bindings

Mode	Key Bindings	Descriptions
normal	SPC l g A	generate accessors
normal/visual	SPC l g s	generate setter accessor
normal/visual	SPC l g g	generate getter accessor
normal/visual	SPC l g a	generate setter and getter accessor
normal	SPC l g M	generate abstract methods
insert	Ctrl-j s	generate setter accessor
insert	Ctrl-j g	generate getter accessor
insert	Ctrl-j a	generate getter and setter accessor
normal	SPC l g t	generate toString function
normal	SPC l g e	generate equals and hashcode function
normal	SPC l g c	generate constructor
normal	SPC l g C	generate default constructor

Code formatting

The default key bindings for format current buffer is SPC b f. And this key binding is defined in format layer. You can also use g= to indent current buffer.

To make neoformat support Java file, you should install uncrustify. Or download google's formater jar and add let g:spacevim_layer_lang_java_formatter = 'path/to/google-java-format.jar' to SpaceVim custom configuration file.

Maven

Key Bindings	Descriptions
SPC l m i	Run maven clean install
SPC l m I	Run maven install
SPC l m p	Run one already goal from list
SPC l m r	Run maven goals
SPC l m R	Run one maven goal
SPC l m t	Run maven test

Jump

Key Bindings	Descriptions
SPC l j a	jump to alternate file

Inferior REPL process

Start a jshell inferior REPL process with SPC l s i.

Send code to inferior process commands:

Key Bindings	Descriptions
SPC l s b	send buffer and keep code buffer focused
SPC l s l	send line and keep code buffer focused
SPC l s s	send selection text and keep code buffer focused