bazel-java.nvim

A Neovim plugin to automatically set up Bazel support for Java using nvim-jdtls. This plugin downloads the necessary JARs from the bazel-eclipse-vscode extension and configures jdtls to use them.

• Automatic downloading and extraction of Bazel Java extensions.
• Registers Bazel commands (Sync, Update Classpaths, etc.).
• Adds keymaps via which-key (if available).
• Seamless integration with LazyVim's Java extra.

{
  "Chazmus/bazel-java.nvim",
},
{
  "mfussenegger/nvim-jdtls",
  dependencies = { "Chazmus/bazel-java.nvim" },
  opts = function(_, opts)
    -- jdtls requires Java 21+, specify the path if it's not your system default
    -- table.insert(opts.cmd, "--java-executable=/path/to/java-21/bin/java")

    require("bazel-java").setup_jdtls(opts)
  end,
}

LazyVim's nvim-jdtls spec builds its final init_options.bundles/root_dir/settings inside its own config() function, from a local variable it computes itself (mason's java-debug-adapter/java-test globs). It only merges in opts.jdtls right before starting the server, calling it as a function against the fully built config. Setting things directly on opts in your own opts function (as above) gets silently discarded, so wire setup_jdtls through opts.jdtls instead:

{
  "Chazmus/bazel-java.nvim",
},
{
  "mfussenegger/nvim-jdtls",
  dependencies = { "Chazmus/bazel-java.nvim" },
  opts = function(_, opts)
    opts.jdtls = function(config)
      return require("bazel-java").setup_jdtls(config)
    end
  end,
}

After installing the plugin, you need to download the required JARs by running:

:BazelJavaInstall

This will download the extension from the VS Code Marketplace and extract it to your Neovim data directory.

• <leader>jbs: Sync Projects
• <leader>jbu: Update Classpaths
• <leader>jbd: Sync Directories Only

• guw.bazel-eclipse-vscode for the underlying Bazel support.
• nvim-jdtls for the Java LSP client.