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

This commit is contained in:

asmhatre

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

co-authored by

Claude Sonnet 5

parent 202f2f18a5

commit af615cc17c

15 changed files with 514 additions and 0 deletions

									
										pom.xml
									
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				@@ -20,6 +20,7 @@

				    <module>synchronizers</module>

				    <module>executors</module>

				    <module>concurrency-interview</module>

				    <module>arithmetic</module>

				  </modules>

				  <properties>