Java

ci(.github): update Go integration and vet script #1601

	# Copyright 2026 Google LLC
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# https://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
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	name: Java
	on: [push, pull_request, merge_group]
	permissions:
	contents: read
	jobs:
	test:
	runs-on: ubuntu-24.04
	# Presubmit jobs must complete within 5 minutes. See CONTRIBUTING.md.
	timeout-minutes: 5
	steps:
	- uses: actions/checkout@v6
	- uses: actions/setup-go@v6
	with:
	go-version-file: "go.mod"
	- name: Display Go version
	run: go version
	- uses: actions/setup-java@v4
	with:
	java-version: "17"
	distribution: "temurin"
	- name: Display Java version
	run: java -version
	- name: Install Java tools
	run: \|
	./.github/workflows/scripts/install_java_tools.sh "$HOME/java_tools"
	echo "$HOME/java_tools/bin" >> $GITHUB_PATH
	- name: Verify tools
	run: \|
	protoc --version
	google-java-format --version
	# Verify plugins are executable (they don't support --version)
	test -x "$(which protoc-gen-java_grpc)"
	test -x "$(which protoc-gen-java_gapic)"
	- name: Run internal/librarian/java tests and check coverage
	run: go run ./tool/cmd/coverage ./internal/librarian/java

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