Add checkstyle in maven build #11

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	# Licensed under the Apache License, Version 2.0 (the "License");
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	# You may obtain a copy of the License at
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	# http://www.apache.org/licenses/LICENSE-2.0
	#
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	# distributed under the License is distributed on an "AS IS" BASIS,
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	# A workflow to java style check
	name: java format check

	on:
	pull_request:
	types: [opened, synchronize, reopened]

	jobs:
	pre-commit:
	runs-on: ubuntu-latest
	steps:
	- name: Set up JDK
	uses: actions/[email protected]
	with:
	java-version: '8'
	distribution: 'adopt'

	- uses: actions/checkout@v4
	with:
	submodules: true
	fetch-depth: 0

	- name: Fetch branches and tags
	run: \|
	git fetch --all
	git --no-pager branch -a

	- name: Run checkstyle
	run: bash ./dev/checkstyle.sh

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