How does importing libraries from a package affect the performance and byte size of Java code?

Question

Java

And I have a question - how will the size of the bytes of the java code, after compilation, affect the import of only the necessary functions or all classes from the package (. *)? How does importing classes affect performance? I often notice that when I write a function myself, it doesn't run much faster than with a "ready-made" import. Have you noticed this?

Answer 1

Doesn't affect at all. This is just an indication to the compiler and JVM where to get the necessary classes.