Table addColumn 引发的 ArrayOutOfBoundsException

 1 Public class myScrollPane extends JScrollPane implements ListSelectionListener {
 2     /**
 3      * 
 4      */
 5     private static final long serialVersionUID = 1L;
 6     static JTable table;
 7     private DefaultListSelectionModel selectionModel;
 8     private static DefaultTableModel tableModel;
 9     private static Vector<Object> data = new Vector<Object>();
10     private static Vector<String>  column_names = new Vector<String>();
11     myScrollPane(){
12         super();
13         //database for table
14         .....
15 
16         tableModel = new DefaultTableModel(){
17             private static final long serialVersionUID = 1L;
18 
19             public Class<?> getColumnClass(int column) {
20                 return (column==4)?(Boolean.class):(String.class);
21             }
22             
23         };
24         
25         tableModel.setDataVector(data, column_names);
26         table = new JTable(tableModel);
27         table.setModel(tableModel);
28         
29         tableModel.addTableModelListener(new TableModelListener(){
30             public void tableChanged(TableModelEvent arg0) {
31                 //event‘s column == -1 occurs when adding a new column
32                 if (arg0.getColumn()!=-1){
33                     int Row = arg0.getFirstRow();
34                     int Col = arg0.getColumn();
35                     String new_value = table.getValueAt(Row, Col).toString() ;
36                     proof_main.libreria.update_records(Row, Col, new_value);
37                     
38                 }
39             }
40             
41         });
42         
43         
44         setViewportView(table);
45         //setting scrollpane
46         setVerticalScrollBarPolicy(VERTICAL_SCROLLBAR_ALWAYS);
47         setHorizontalScrollBarPolicy(HORIZONTAL_SCROLLBAR_AS_NEEDED);
48         
49         selectionModel = new DefaultListSelectionModel();
50         selectionModel.addListSelectionListener(this);
51         selectionModel.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
52         table.setSelectionModel(selectionModel);
53     }
54 
55     public void valueChanged(ListSelectionEvent e) {
56         int selectedRow = table.getSelectedRow();
57         if (selectedRow!= (-1)) Main_panel.research_and_infoPanel.displayInfo(selectedRow);
58         
59     }