Added Kruskal’s Algorithm in Java (Java/graphs/KruskalAlgorithm.java)

[MJ-thunder]

📘 Summary

This pull request adds an implementation of the Kruskal’s Algorithm in Java under the Java/graphs/ directory.
The file KruskalAlgorithm.java demonstrates how to find a Minimum Spanning Tree (MST) using the Disjoint Set (Union-Find) approach.

🧠 Details

Implemented Kruskal’s Algorithm with edge sorting and union–find cycle detection.

Added a main() method with sample input for quick testing.

Followed consistent structure and formatting used across existing graph algorithms (e.g., DijkstraAlgorithm.java, BellmanFord.java, etc.).

🏷️ Tags

hacktoberfest2025 java graphs minimum-spanning-tree beginner-friendly

✅ Checklist

Added KruskalAlgorithm.java under Java/graphs/

Code compiles and runs successfully

Included sample test case in main()

Follows existing naming and formatting conventions

💬 Notes

This addition enriches the graph algorithms collection by introducing a classic greedy MST algorithm, complementing other graph traversal and shortest-path implementations in the repository.

[github-actions]

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[github-actions]

🤖 Automated PR Status

🔍 Code Validation

✅ Passed - File naming and structure look good!

🧪 Compilation Tests

✅ Passed - All code compiles successfully!

📋 Overall Status

🎉 Ready for Review - Your PR has passed all automated checks!
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