adambien/python-to-java
java/python-to-java/SKILL.md
Convert Python scripts to zero-dependency Java 25 CLI programs. Use when asked to migrate, convert, port, or rewrite Python scripts (.py) to Java, or when translating a Python codebase to Java CLI scripts or apps. Triggers on "convert Python to Java", "migrate Python", "port to Java", "rewrite in Java", or when a .py file is presented with instructions to produce a Java equivalent. Prefer /java-cli-script for single-file scripts; switch to /java-cli-app when shared code duplication across scripts exceeds ~100 lines.
$ install --global
skillsauthnpx skillsauth add adambien/airails python-to-javaInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Last scanned: Mar 30, 2026, 11:11 AM56.9s2 files scanned
SKILL.md
- name:
- python-to-java
- description:
- >
Python to Java Migration
Convert Python scripts to idiomatic Java 25 CLI programs with zero external dependencies.
Decision: Single-File vs Multi-File
Evaluate before writing any code:
- Start with
/java-cli-script— one Java file per Python script, no build tool - Switch to
/java-cli-appwhen any of these apply:- Multiple scripts share >100 lines of identical code (e.g. domain records)
- A single script exceeds ~500 lines
- Scripts import from each other in Python (
from module import func)
When switching to /java-cli-app, extract shared code into common source files within the multi-file project.
Migration Process
- Read all Python scripts — understand dependencies between them (
importgraph) - Identify shared code —
utils.py, common helpers, shared data classes - Decide single-file vs multi-file per the rules above
- Translate each script using the idiom mapping below
- Verify — run each script with
-versionto confirm compilation
Python to Java 25 Idiom Mapping
See references/idiom-mapping.md for the complete translation table covering argument parsing, file I/O, subprocess management, concurrency, and standard library equivalents.
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