-
-import java.awt.*;
-import java.awt.event.*;
-import javax.swing.*;
-import javax.swing.event.*;
-import javax.swing.table.*;
+import java.util.Map;
+
+import javax.swing.Icon;
+import javax.swing.JLabel;
+import javax.swing.JTable;
+import javax.swing.event.TableModelEvent;
+import javax.swing.event.TableModelListener;
+import javax.swing.table.AbstractTableModel;
+import javax.swing.table.JTableHeader;
+import javax.swing.table.TableCellRenderer;
+import javax.swing.table.TableColumnModel;
+import javax.swing.table.TableModel;