Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
If I instantiate an object and pass it to an function, in this function I assign this object to null.
It seems when return from the function, the object still there.
I just want to know when I assign null, what happens.
You can never assign to an object. All you ever have are primitives and references. A reference is either null or a pointer to an object of suitable class.
Java arguments are passed by value. Your called method got a copy of a reference. It made that reference null. The calling method has its own reference which was unaffected by any assignments to the passed copy. That reference still points to the object.