[diegourban]

Follow-up to #9, making the other static-only classes match Sequences.

• ArrayUtils, BinarySearch, Combinatorics, Geometry, Measurement, Numbers, NumberTheory, Statistics and StringUtils only have static methods (checked with javap), so each gets a private constructor. They can no longer be instantiated by mistake.
• The eight shouldCreateInstance tests existed only to cover the implicit public constructor, so they're removed. JaCoCo leaves private empty constructors out of coverage, so nothing is hidden or excluded.
• Reader and SampleBuilder keep their shouldCreateInstance tests, since those create real objects.

Nothing outside those eight tests instantiated these classes.

Test plan

• ./mvnw verify: 574 tests (582 − 8), coverage floors met (line 97.3%, branch 91.0%)
• CI, Codecov and Codacy green

🤖 Generated with Claude Code

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 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.

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[codacy-production]

Pull Request Overview

✅ No blocking issues noticed

No blocking findings were identified. Functional tests are present, but constructor visibility and unaffected instantiable classes lack explicit automated coverage.

About this PR

• Add automated tests covering constructor visibility for the utility classes and confirming that the intended object-oriented classes remain instantiable.

Test suggestions

• Verify utility classes do not expose public constructors
• Run existing functional tests for each utility class
• Verify Reader and SampleBuilder remain instantiable

Prompt proposal for missing tests

Consider implementing these tests if applicable:
1. Verify utility classes do not expose public constructors
2. Verify Reader and SampleBuilder remain instantiable

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.17%. Comparing base (0237e3d) to head (3389830).

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #10      +/-   ##
============================================
+ Coverage     94.09%   94.17%   +0.08%     
+ Complexity      264      256       -8     
============================================
  Files            24       24              
  Lines           593      584       -9     
  Branches         94       94              
============================================
- Hits            558      550       -8     
+ Misses           17       16       -1     
  Partials         18       18              

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