Source: www.reddit.com

Consider having the next classes:

java.Class1

java.Class2

java.pkg1.Class3

java.pkg2.Class4

If you write "import*;", it will import nothing (if it compiles).

If you write "import java.*;", it will import Class1 and Class2.

If you write "import java.pkg1.*;", it will import Class3

- gr1n3lack