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jls21
Unboxing Conversion
Java Language Specification, Version Java SE 21 Edition
5.1.8. Unboxing Conversion
Read this Section of the Authoritative Specification
https://docs.oracle.com/javase/specs/jls/se21/html/jls-5.html#jls-5.1.8
2 Documented Misconceptions
ReferenceToBooleanCoercion
Every reference type can be coerced to boolean
ReferenceToIntegerConversion
One can cast between references and ints
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