Drop Python 3.9

[eggplants]

Note

Merge after 31 Oct 2025

fixes: #33

Drop Python 3.9 and use jdk4py as default for portability.

Edit: jdk4py supports only a limited number of architectures, and if it is made mandatory, it will no longer work on Android or Windows on ARM, for example. Therefore, I would like to make it optional again.

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After merged,

• release 7.14.0.post0
• update the documentation

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
__init__.py	33	9	72%	33, 37–38, 44, 61–64, 68
TOTAL	33	9	72%

Tests	Skipped	Failures	Errors	Time
3	0 💤	0 ❌	0 🔥	2.345s ⏱️

[Copilot]

Pull Request Overview

This PR drops Python 3.9 support and makes jdk4py a required dependency instead of optional, improving portability by bundling Java runtime with the package.

• Removes Python 3.9 support and updates minimum required version to 3.10
• Makes jdk4py a required dependency instead of optional
• Simplifies Java runtime detection by removing fallback to system Java

Reviewed Changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
pyproject.toml	Updates Python version requirements and makes jdk4py a required dependency
openapi_generator_cli/init.py	Removes Java detection fallback logic and imports jdk4py directly
README.md	Updates installation instructions to reflect jdk4py as default
.pre-commit-config.yaml	Updates pre-commit hook versions
.github/workflows/test.yaml	Removes Python 3.9 from test matrix and Java setup step

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[wing328]

thanks for the PR

given that python 3.9 is still supported (https://endoflife.date/python, last release in jun 2025)

shall we keep it for another 2 months before dropping its support?