[hardikkaurani]

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new algorithms include a corresponding test class that validates their functionality.
• All new code is formatted with \clang-format -i --style=file path/to/your/file.java\

Description

This pull request improves \JumpSearch:

1. Null and Empty Input Safety: Added guard against
   ull\ array, empty array, and
   ull\ key returning -1\ instead of throwing \NullPointerException.
2. Comparable Contract Consistency: Replaced \�rray[i].equals(key)\ with \key.compareTo(array[i]) == 0\ for proper \Comparable\ contract semantics.
3. Class Final Modifier: Marked \public final class JumpSearch implements SearchAlgorithm\ consistent with utility implementations in \com.thealgorithms.searches.
4. Expanded Tests: Added unit tests for null array, null key, single-element array with absent target, duplicate elements, and string arrays.

CC: @alxkm for review

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[hardikkaurani]

Hi @alxkm, opened this PR to add null safety guards (returning -1 on null/empty inputs) and ensure Comparable contract consistency (\key.compareTo(array[i]) == 0) in \JumpSearch, matching the conventions in other search algorithms in this package. Whenever convenient, please take a look! Thanks!

[codecov-commenter]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 82.19%. Comparing base (2dd1a0a) to head (50d2a5e).

Files with missing lines	Patch %	Lines
...in/java/com/thealgorithms/searches/JumpSearch.java	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #7653      +/-   ##
============================================
- Coverage     82.22%   82.19%   -0.03%     
  Complexity     8391     8391              
============================================
  Files           843      843              
  Lines         26125    26127       +2     
  Branches       5096     5096              
============================================
- Hits          21480    21476       -4     
- Misses         3857     3858       +1     
- Partials        788      793       +5     

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[DenizAltunkapan]

@hardikkaurani thanks!