Is Java really passing objects by value? [duplicate]

Java always passes arguments by value, NOT by reference. In your example, you are still passing obj by its value, not the reference itself. Inside your method changeName, you are assigning another (local) reference, obj, to the same object you passed it as an argument. Once you modify that reference, you are modifying the original … Read more

What’s the difference between parse trees and abstract syntax trees (ASTs)?

This is based on the Expression Evaluator grammar by Terrence Parr. The grammar for this example: grammar Expr002; options { output=AST; ASTLabelType=CommonTree; // type of $stat.tree ref etc… } prog : ( stat )+ ; stat : expr NEWLINE -> expr | ID ‘=’ expr NEWLINE -> ^(‘=’ ID expr) | NEWLINE -> ; expr … Read more

The most correct way to refer to 32-bit and 64-bit versions of programs for x86-related CPUs?

x86 can be a broad term that covers all CPUs that are backwards-compatible with 8086, and all extensions to the architecture including x86-64. Note that IA-64 is not x86 at all, it’s Itanium (a 64-bit VLIW architecture with explicit speculation / parallelism). It was also designed by Intel, but is totally unrelated to x86 in … Read more