Answer 1

import javax.swing.JOptionPane imports only the JOptionPane class in javax.swing package but if you do import javax.swing.* all classes in javax.swing package will be imported. The asterisk (*) is a wildcard that imports all classes.

Answer 2

there are also packages with similar names that must be imported separately

import javax.swing.*;
import javax.swing.text.*;

Answer 3

Dou you use netbeans?

Answer 4

Thanks

Answer 5

Yot