Java : Accessing a class within a package, which is the better way?

Question

If I access a class within a package using fully qualified name, without importing it, whether it saves any memory?

Using fully qualified class name :

java.lang.Math.sqrt(x);

Import package :

import java.lang.Math;

Math.sqrt(x);

which is the better way : import the package or access using fully qualified name?

Thanking you..

Answer 1

There is no performance difference between importing the package or using the fully qualified class name. The import directive is not converted to Java byte code, consequently there is no effect on runtime performance. The only difference is that it saves you time in case you are using the imported class multiple times. This is a good read here