+import java.awt.BorderLayout;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.GridLayout;
+import java.awt.Insets;
+import java.awt.event.ActionEvent;
+import java.awt.event.KeyEvent;
+
+import javax.swing.JButton;
+import javax.swing.JCheckBox;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.SwingConstants;
+import javax.swing.SwingUtilities;
+import javax.swing.event.CaretEvent;
+import javax.swing.event.CaretListener;
+import javax.swing.text.JTextComponent;
+