-public class PCAPanel extends EmbmenuFrame implements Runnable,
- ActionListener, ItemListener
+import java.awt.BorderLayout;
+import java.awt.Button;
+import java.awt.CheckboxMenuItem;
+import java.awt.Choice;
+import java.awt.Color;
+import java.awt.FlowLayout;
+import java.awt.Frame;
+import java.awt.Label;
+import java.awt.Menu;
+import java.awt.MenuBar;
+import java.awt.MenuItem;
+import java.awt.Panel;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.ItemEvent;
+import java.awt.event.ItemListener;
+
+public class PCAPanel extends EmbmenuFrame
+ implements Runnable, ActionListener, ItemListener