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108 lines
4.0 KiB
Markdown
108 lines
4.0 KiB
Markdown
---
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title: "SpaceVim lang#java layer"
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description: "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."
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---
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# [SpaceVim Layers:](https://spacevim.org/layers) lang#java
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<!-- vim-markdown-toc GFM -->
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- [Description](#description)
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- [Feature](#feature)
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- [Install](#install)
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- [Key bindings](#key-bindings)
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- [Import key bindings](#import-key-bindings)
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- [Generate key bindings](#generate-key-bindings)
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- [Code formatting](#code-formatting)
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- [Maven](#maven)
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- [Jump](#jump)
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- [Inferior REPL process](#inferior-repl-process)
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<!-- vim-markdown-toc -->
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## Description
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This layer is for Java development.
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## Feature
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- code completion: `autocomplete` layer
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- code formatting
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- refactoring
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- syntax checking: `checkers` layer
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- REPL(need java8's jshell)
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- debug: check out the `debug` layer
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## Install
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To use this configuration layer, add `SPLayer 'lang#java'` to your custom configuration file.
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## Key bindings
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### Import key bindings
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| Key Binding | Description |
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| -------------------- | ------------------------------- |
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| `F4` (Insert/Normal) | Import class under cursor |
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| `SPC l I` | Import missing classes |
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| `SPC l R` | Remove unused classes |
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| `SPC l i` | smart import class under cursor |
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| `<C-j>I` (Insert) | Import missing classes |
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| `<C-j>R` (Insert) | Remove unused classes |
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| `<C-j>i` (Insert) | smart import class under cursor |
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### Generate key bindings
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| Mode | Key Binding | Description |
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| ------------- | ----------- | ------------------------------------- |
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| normal | `SPC l g A` | generate accessors |
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| normal/visual | `SPC l g s` | generate setter accessor |
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| normal/visual | `SPC l g g` | generate getter accessor |
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| normal/visual | `SPC l g a` | generate setter and getter accessor |
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| normal | `SPC l g M` | generate abstract methods |
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| insert | `<c-j>s` | generate setter accessor |
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| insert | `<c-j>g` | generate getter accessor |
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| insert | `<c-j>a` | generate getter and setter accessor |
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| normal | `SPC l g t` | generate toString function |
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| normal | `SPC l g e` | generate equals and hashcode function |
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| normal | `SPC l g c` | generate constructor |
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| normal | `SPC l g C` | generate default constructor |
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### Code formatting
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the default key bindings for format current buffer is `SPC b f`. and this key bindings is defined in [format layer](<>). you can also use `g=` to indent current buffer.
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To make neoformat support java file, you should install uncrustify. or
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download [google's formater jar](https://github.com/google/google-java-format)
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and add `let g:spacevim_layer_lang_java_formatter = 'path/to/google-java-format.jar'`
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to SpaceVim custom configuration file.
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### Maven
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| Key Binding | Description |
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| ----------- | ------------------------------ |
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| `SPC l m i` | Run maven clean install |
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| `SPC l m I` | Run maven install |
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| `SPC l m p` | Run one already goal from list |
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| `SPC l m r` | Run maven goals |
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| `SPC l m R` | Run one maven goal |
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| `SPC l m t` | Run maven test |
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### Jump
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| Key Binding | Description |
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| ----------- | ---------------------- |
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| `SPC l j a` | jump to alternate file |
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### Inferior REPL process
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Start a `jshell` inferior REPL process with `SPC l s i`.
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Send code to inferior process commands:
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| Key Binding | Description |
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| ----------- | ------------------------------------------------ |
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| `SPC l s b` | send buffer and keep code buffer focused |
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| `SPC l s l` | send line and keep code buffer focused |
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| `SPC l s s` | send selection text and keep code buffer focused |
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