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asmhatreandClaude Sonnet 5 af615cc17c arithmetic: companion code for the Add Two Numbers Without Overflow post

Silent int/long overflow reproduced with real numbers, the Math *Exact()
family (addExact/subtractExact/multiplyExact/incrementExact/decrementExact/
negateExact/toIntExact/absExact) with the abs(MIN_VALUE) trap absExact
exists to catch, widening to long vs BigInteger, and the XOR-based overflow
bit trick Math.addExact uses internally, cross-checked against BigInteger
ground truth over 100k random int pairs per JUnit repeat.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01FhzLY5p6okFva3qsnsRyvM

2026-09-30 09:16:49 +00:00

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java-core-examples

Runnable companion code for ankurm.com's Java-core / concurrency series. One Maven module per article; each module's own README has that article's version table, quickstart, and traps.

Module	Post
`jmm`	The Java Memory Model Explained: volatile, happens-before, and Why Your Double-Checked Lock Failed
`locks`	synchronized vs ReentrantLock vs StampedLock: Benchmarks and a Decision Table
`atomics`	Java Atomics and VarHandle: CAS, LongAdder, and When Atomics Beat Locks
`vt-pinning`	Diagnosing Virtual Thread Pinning in Production: JFR Events, jcmd, and Real Fixes
`synchronizers`	CountDownLatch vs CyclicBarrier vs Phaser vs Semaphore in Java
`executors`	ExecutorService Done Right: Shutdown, try-with-resources and Virtual Thread Executors
`concurrency-interview`	Top 40 Java Concurrency Interview Questions and Answers (2026)
`arithmetic`	Add Two Numbers in Java Without Overflow: addExact, Widening, and BigInteger

License

MIT - see LICENSE.

1.1 KiB Raw Blame History

java-core-examples

License

1.1 KiB

Raw Blame History