If I say:
import java.awt.event.ActionListener;
I get the ActionListener Class. If I say:
import java.awt.event.*; <
import java.awt.event.*;
java.awt.* is different with java.awt.event.*, the first one will import all the classes within java.awt package, while the second one will import all the classes within java.awt.event, the import function will only import classes, not packages.
java.awt.*
java.awt.event.*
java.awt
java.awt.event