![]() When the method or constructor is invoked (§15.12), the values of the actual argument expressions initialize newly created parameter variables, each of the declared type, before execution of the body of the method or constructor. ![]() ![]() Read the Java Language Specification (JLS). Java is strictly pass-by-value, exactly as in C. Anytime the method/function uses the formal parameter (for reading or writing), it is actually using the actual parameter. The formal parameter merely acts as an alias for the actual parameter. That location is typically a chunk of memory on the runtime stack for the application (which is how Java handles it), but other languages could choose parameter storage differently. The actual parameter (or argument expression) is fully evaluated and the resulting value is copied into a location being used to hold the formal parameter’s value during method/function execution. I want to correct that… The following is how I’d describe these Pass-by-value ![]() The terms “pass-by-value” semantics and “pass-by-reference” semantics have very precise definitions, and they’re often horribly abused when folks talk about Java. I’m really tired of hearing folks (incorrectly) state “primitives are passed by value, objects are passed by reference”. I finally decided to write up a little something about Java’s parameter passing.
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