Documentation/Languages/Java
đŸ’Ŧ

Java

v1.2.0Apache 2.0

Advanced Java skills for streams, concurrency, and generics.

languagesskillhooklspjavastreamsconcurrency

Installation

Install han binary (required for hooks to work):

curl -fsSL https://han.guru/install.sh | bash

Then install this plugin:

han plugin install java

Overview

Advanced Java skills for streams, concurrency, and generics.

Skills

This plugin provides the following skills:

  • Concurrency
  • Generics
  • Streams Api

Usage

Once enabled, Claude will automatically apply these skills when working with relevant code. The plugin provides context and expertise that Claude uses to:

  • Write idiomatic code following best practices
  • Suggest appropriate patterns and architectures
  • Catch common mistakes and anti-patterns
  • Provide framework-specific guidance

Installation

Install via the han CLI:

bash
han plugin install java

LSP Servers

🧠

jdtls

Languages:

java

File Extensions:

.java

Command:

${CLAUDE_PLUGIN_ROOT}/scripts/lsp-entrypoint.sh

Skills

📖

java-concurrency

Use when Java concurrency with ExecutorService, CompletableFuture, and virtual threads. Use when building concurrent applications.

📖

java-generics

Use when Java generics including type parameters, wildcards, and type bounds. Use when writing type-safe reusable code.

📖

java-streams-api

Use when Java Streams API for functional-style data processing. Use when processing collections with streams.

Hooks

🛑

Stop

Runs when the main Claude Code agent has finished responding. Can verify task completion, check quality gates, or ensure documentation requirements are met before the session ends.

han hook run java build --async
han hook run java test --async
🛑

SubagentStop

Runs when a Claude Code subagent (Agent tool call) has finished responding. Can validate subagent outputs, enforce quality standards, or trigger additional workflows after delegated tasks complete.

han hook run java build --async
han hook run java test --async