[diegourban]

Clean-code PR C of 4 (formatting ✅ → final ✅ → Javadoc → approved findings).

What changed

• Complete Javadoc on every public and protected member of the library (23 files). Before this there were 101 doclint findings: 73 members with no comment, empty @param/@return descriptions, and malformed HTML.
• Docs describe actual behaviour, including quirks and limits. For example:
  • Statistics.median sorts the caller's array in place;
  • fibonacci only works for n ≤ 46;
  • the Binet variants are approximate beyond their tested ranges;
  • LinkedList.get throws IllegalArgumentException for a missing position;
  • each sort states its time and space complexity.
• The only code added: explicit, documented, empty no-arg constructors where a class relied on the implicit one, which doclint can't document. They're in LinkedList, Queue, Stack, Vector, InsertionSort, MergeSort, QuickSort and SelectionSort.
  • Verified mechanically: with comments and whitespace removed, every file is identical to before, apart from those 8 constructors.
• Enforcement: the library compiles (default-compile) with -Xdoclint:all/protected -Werror, so a public or protected member without complete Javadoc fails ./mvnw verify. Test and problem sources aren't affected. Before the docs landed, a clean build failed on the 101 findings.

Possible bugs noticed while documenting (not changed here)

These were documented as the code behaves today; whether to fix them is a separate decision. Examples: LinkedList.add(0, e) on a non-empty list throws; Vector.remove has no bounds check; Element has no hashCode; Numbers.toArray casts before % 10; Geometry uses π = 3.14.

Test plan

• ./mvnw clean verify: doclint, 591 tests, Spotless, PMD and coverage floors pass
• CI, Codacy, Codecov green

🤖 Generated with Claude Code

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.65%. Comparing base (98bba13) to head (f9223da).

Additional details and impacted files

@@            Coverage Diff            @@
##             master      #14   +/-   ##
=========================================
  Coverage     99.65%   99.65%           
  Complexity      279      279           
=========================================
  Files            24       24           
  Lines           576      576           
  Branches         94       94           
=========================================
  Hits            574      574           
  Partials          2        2           

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[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

View in Codacy

🟢 Metrics 0 complexity · 0 duplication

Metric	Results
Complexity	0
Duplication	0

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AI Reviewer: first review requested successfully. AI can make mistakes. Always validate suggestions.

_{TIP This summary will be updated as you push new changes.}

[codacy-production]

Pull Request Overview

⚠️ Resolve issues before merging

The current build configuration does not enforce the intended documentation checks: -Xdoclint is configured as a compiler argument even though it belongs to the Javadoc tool, so the verification build may fail on an unsupported option or fail to validate the API documentation. This acceptance criterion remains unaddressed and should be corrected before merging.

No automated verification scenarios are included, and there is no independent evidence in the diff that all public/protected members are documented or that runtime behavior remains unchanged.

Test suggestions

• Run a clean Maven verification build and confirm doclint rejects missing or malformed public/protected documentation.
• Verify the eight explicitly added no-argument constructors are available and preserve the previous default construction behavior.
• Exercise documented edge-case behavior for collections, numeric utilities, geometry, I/O, and sorting APIs.
• Confirm the documentation-only changes do not alter existing library behavior.

Prompt proposal for missing tests

Consider implementing these tests if applicable:
1. Run a clean Maven verification build and confirm doclint rejects missing or malformed public/protected documentation.
2. Verify the eight explicitly added no-argument constructors are available and preserve the previous default construction behavior.
3. Exercise documented edge-case behavior for collections, numeric utilities, geometry, I/O, and sorting APIs.
4. Confirm the documentation-only changes do not alter existing library behavior.

Low confidence findings

• Add automated verification for the documented API behavior and constructor changes, and include a build or generated-Javadoc check that independently demonstrates complete public/protected API documentation.

Make this review better

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[codacy-production]

_{🔴 HIGH RISK}

-Xdoclint is a Javadoc-tool option, not a javac option, so configuring it under the compiler plugin cannot reliably enforce API documentation and may make compilation fail with an unsupported flag. Move doclint and warning-as-error enforcement to the Maven Javadoc plugin, configured for the protected API, and keep only compiler-supported arguments under the compiler plugin.

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