--- tags: [code, java, pretraining, csci680] language: [code, en] size_categories: [100K=100 stars, >=100 commits, >=3 contributors, last commit >= 2023-01-01, >=2,000 code lines). One JSON object per line: `id`, `source` (`method`, `commit` or `review`), `repo`, `text`, `tokens`. | Source | Instances | One instance is | |---|---|---| | method | 648,060 | a Java method or constructor with its Javadoc and inline comments; annotations dropped, whitespace collapsed | | commit | 178,933 | a commit message (default branch, merges and bots excluded) | | review | 77,087 | a pull-request review thread (a review comment and its replies, bots excluded) | Exact and near duplicates (MinHash LSH, Jaccard >= 0.8 on token 3-grams), non-Latin scripts and invalid UTF-8 were removed, and every instance containing a validation or test input or target of the code-review fine-tuning data (Tufano et al., ICSE 2022, as subsampled for the course) was removed (493 instances). Instances are 10 to 512 tokens under the accompanying SentencePiece tokenizer. `heldout.jsonl` is the 1% held-out split (seed 680). The code in this corpus comes from the MIT-licensed repositories listed, with the commit SHA mined, in `corpus/repos_mined.csv` of the course repository `aura-lab-wm/teaching-genai4se-2026-jtang05`; each repository's MIT license and copyright notice apply to its code. Commit messages and review comments are by those projects' contributors.