plugin official · Anthropic

jdtls-lsp — Claude Code plugin: Java and installation

Q: How do I install jdtls-lsp in Claude Code?

Run `/plugin marketplace add anthropics/claude-plugins-official` first, then run `/plugin install jdtls-lsp@claude-plugins-official`. Install JDK 17 or later and JDT.LS using one of the supported system or manual methods.

Q: What does jdtls-lsp require?

It requires JDK 17 or later. On macOS, install JDT.LS with `brew install jdtls`; on Arch Linux, use `yay -S jdtls`. Manual installation uses a wrapper script named `jdtls` in PATH.

Connects Eclipse JDT.LS to Claude Code for Java code intelligence and refactoring. It works with .java files.

Install into Claude Code · Plugin marketplace All methods and platforms ↓

/plugin install jdtls-lsp@claude-plugins-official
/plugin marketplace add anthropics/claude-plugins-official

Open on GitHub

What jdtls-lsp does

jdtls-lsp connects the Eclipse JDT.LS language server to Claude Code. It provides Java code intelligence and refactoring support for files with the .java extension.

The plugin requires JDK 17 or later, not only a JRE. Check that requirement first, because the language server depends on a full JDK. JDT.LS can be installed with brew install jdtls on macOS, with yay -S jdtls on Arch Linux, or manually by downloading a release, extracting it, and placing a wrapper script named jdtls in PATH.

What it helps with

inspect Java code in Claude Code
refactor .java files
connect Eclipse JDT.LS to a Claude Code project
install the Java language server with a system package manager

Example prompts for the agent

Analyze this .java file and identify type errors and dependency structure.
Suggest a refactoring for this Java class using Eclipse JDT.LS capabilities.
Inspect this Java project and show which code changes can be made safely.

How to install jdtls-lsp

Plugin marketplace

/plugin install jdtls-lsp@claude-plugins-official

/plugin marketplace add anthropics/claude-plugins-official

Step by step, with commands for each platform: Claude Code plugins: marketplaces, installing, and building your own

Questions about jdtls-lsp

How do I install jdtls-lsp in Claude Code?

Run /plugin marketplace add anthropics/claude-plugins-official first, then run /plugin install jdtls-lsp@claude-plugins-official. Install JDK 17 or later and JDT.LS using one of the supported system or manual methods.

What does jdtls-lsp do?

The plugin connects Eclipse JDT.LS to Claude Code. It adds Java code intelligence and refactoring support for .java files.

What does jdtls-lsp require?

It requires JDK 17 or later. On macOS, install JDT.LS with brew install jdtls; on Arch Linux, use yay -S jdtls. Manual installation uses a wrapper script named jdtls in PATH.

Source text

jdtls-lsp · Apache-2.0

# jdtls-lsp

Java language server (Eclipse JDT.LS) for Claude Code, providing code intelligence and refactoring.

## Supported Extensions
`.java`

## Installation

### Via Homebrew (macOS)
```bash
brew install jdtls
```

### Via package manager (Linux)
```bash
# Arch Linux (AUR)
yay -S jdtls

# Other distros: manual installation required
```

### Manual Installation
1. Download from [Eclipse JDT.LS releases](https://download.eclipse.org/jdtls/snapshots/)
2. Extract to a directory (e.g., `~/.local/share/jdtls`)
3. Create a wrapper script named `jdtls` in your PATH

## Requirements
- Java 17 or later (JDK, not just JRE)

## More Information
- [Eclipse JDT.LS GitHub](https://github.com/eclipse-jdtls/eclipse.jdt.ls)
- [VSCode Java Extension](https://github.com/redhat-developer/vscode-java) (uses JDT.LS)

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