import java.awt.BorderLayout;
import java.awt.Dimension;
-import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.util.List;
import javax.swing.Box;
-import javax.swing.BoxLayout;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JCheckBox;