Add FNV-1a hash algorithm implementation #7010
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- Implement FNV-1a (Fowler-Noll-Vo) non-cryptographic hash function - Support both 32-bit and 64-bit hash variants - Hash from String or byte array input - Include hex string output methods - All operations have O(n) time complexity where n is input length - Space complexity O(1) Features: - Generic implementation supporting String and byte arrays - Proper null handling with IllegalArgumentException - Helper methods: hash32Hex() and hash64Hex() for hex output - UTF-8 encoding support for Unicode characters - Full JavaDoc documentation FNV-1a properties: - Fast computation using simple XOR and multiply operations - Good hash distribution minimizing collisions - Widely used in hash tables and checksums - Not suitable for cryptographic purposes Tests: - 30+ comprehensive unit tests covering all methods - Edge cases: empty string, null input, Unicode - Consistency tests (same input -> same output) - Distribution tests (different inputs -> different outputs) - Both String and byte array input validation Time Complexity: O(n) where n is input length Space Complexity: O(1)
dinilH
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DenizAltunkapan,
alxkm and
yanglbme
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Description
Add FNV-1a (Fowler-Noll-Vo) non-cryptographic hash function implementation.
Changes
FNV1aHash.javawith 32-bit and 64-bit variantsWhy This Contribution?
Testing
✅ All tests pass
✅ Edge cases covered (empty, null, Unicode)
✅ Consistency and distribution verified
✅ Both String and byte array inputs tested
References