Improve: Java APIを色々改善 #2249

Job	Run time
actionlint	19s
build-and-test-java-api (windows-latest)	11m 4s
build-and-test-java-api (macos-latest)	4m 25s
build-and-test-java-api (ubuntu-latest)	4m 41s
build-and-test-python-api (windows-latest)	7m 37s
build-and-test-python-api (macos-latest)	4m 8s
build-and-test-python-api (ubuntu-latest)	5m 15s
build-unix-cpp-example (macos-latest, osx-x64-cpu-cpp-shared)	4m 0s
build-unix-cpp-example (ubuntu-latest, linux-x64-cpu-cpp-shared)	2m 57s
build-windows-cpp-example	5m 36s
c-header	54s
rust-integration-test-strategy-matrix	3s
rust-lint	2m 30s
rust-unit-test	4m 55s
shellcheck	13s
validate-cargo-lock	27s
rust-integration-test (windows-2019, directml)	3m 38s
rust-integration-test (macos-11)	3m 18s
rust-integration-test (ubuntu-20.04)	1m 6s
	1h 7m 6s

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