"imports" in
java are NOT the same as "includes" in C. in "C", the included file is basically copied into the original file, thus potentially bloating the code.
In java, all an import does is tell the compiler "instead of writing the fully qualified name, i'm going to use a shorthand". It may slow down the compiling of the program, but it won't slow down the execution of it.
There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors