import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
-import java.awt.Panel;
import java.awt.Rectangle;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
-public class GSequenceLink extends Panel
+public class GSequenceLink extends JPanel
{
public GSequenceLink()
{