What is the difference between "import java.util.*" and "import java.io.*"?

Answer 1

They are two completely separate packages, java.util contains things like list objects, maps, sets etc. so import java.util.*; imports all of those classes. java.io contains things like FileReader, InputStream, OutputStream etc. so import java.io.*; imports all of those classes.

Answer 2

import java util contain things like day.date maps etc while import.java contain iostram .filesca
nnrr etc