Making RAG Accurate in Java

📰 Dev.to · Puneet Gupta

Improve RAG accuracy in Java using hybrid dense+BM25 search and evaluation metrics like recall@k and precision@k

advanced Published 5 Jul 2026
Action Steps
  1. Implement hybrid dense+BM25 search using Java libraries like Apache Lucene or Elasticsearch
  2. Apply metadata filtering to narrow down search results
  3. Use chunking strategy to optimize search performance
  4. Measure recall@k, precision@k, MRR, and nDCG to evaluate RAG accuracy
  5. Configure Reciprocal Rank Fusion to combine multiple ranking models
Who Needs to Know This

Data scientists and software engineers working on information retrieval systems can benefit from this article to improve the accuracy of their RAG models

Key Insight

💡 Hybrid dense+BM25 search with metadata filtering and chunking strategy can significantly improve RAG accuracy

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🚀 Boost RAG accuracy with hybrid search and evaluation metrics!

Key Takeaways

Improve RAG accuracy in Java using hybrid dense+BM25 search and evaluation metrics like recall@k and precision@k

Full Article

Improving retrieval quality beyond cosine top-k: hybrid dense+BM25 search with Reciprocal Rank Fusion, metadata filtering, chunking strategy, and measuring recall@k, precision@k, MRR, and nDCG.
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