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bufferedreader: read a file line by line module (BufferedReader vs Scanner vs Files.lines vs readAllLines on a 1 GB file; heap at -Xmx64m, timings, read-call counts, one-huge-line OOM, charset/BOM/line-terminator pitfalls, Scanner swallowing IOException), 10 contract tests

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Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b3pDoGLiWk6LLBeHjW
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Claude
2026-11-15 01:20:37 +05:30
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bufferedreader/output/06-long-line.txt
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$ java -Xmx128m LongLineDemo line long.txt
mode=line -Xmx128 MB
OutOfMemoryError: Java heap space
$ java -Xmx128m LongLineDemo chunks long.txt
mode=chunks -Xmx128 MB
read(char[]) processed 200,000,071 chars, 2,739,727 commas, never holding more than 8192 chars