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Full-Stack Internet Architecture
Full-Stack Internet Architecture
Nov 10, 2020 · Fundamentals

Understanding Java Integer Caching and the Pitfalls of Using == vs equals

This article explains Java's Integer caching mechanism, why using == on wrapper objects can be misleading outside the -128 to 127 range, shows how to control the cache size with JVM options, and demonstrates bytecode inspection with javap to reveal the underlying valueOf calls.

JVM optionsJavapautoboxing
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Understanding Java Integer Caching and the Pitfalls of Using == vs equals