Passing Variables into Methods

• Methods can take primitives and/or object references as arguments.
• Method arguments are always copies.
• Method arguments are never actual objects (they can be references to objects).
• A primitive argument is an unattached copy of the original primitive.
• A reference argument is another copy of a reference to the original object.
• Shadowing occurs when two variables with different scopes share the same name. This leads to hard-to-find bugs, and hard-to-answer exam questions.