JTable getValueAt方法强制转换为Integer异常

Question

我使用此代码获取我的JTable，

的ID号

但"AWT-EventQueue-0" java.lang.ClassCastException发生，

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == dellButton) {
        try {
            int rowToDelete = 0;
            int rowToModel = 0;
            if (table.getSelectedRow() > -1) {
                rowToDelete = table.getSelectedRow();
                rowToModel = table.convertRowIndexToModel(rowToDelete);
                tableModel.removeRow(rowToModel);
            }
        } catch (SQLException sqle) {
            sqle.printStackTrace();
        }
    }
}

我的TableModel.removeRow()方法：

...
    public void removeRow(int rowNumber) throws SQLException {
    String removeQuery = "delete from mytable where id=?";
    PreparedStatement pStatement = con.prepareStatement(removeQuery);
    pStatement.setInt(1, rowNumber);
    int rowsAffected = pStatement.executeUpdate();
}
...

Answer 1

• int rowID = (int) table.getValueAt(selectedRowIndex, 0);是无用的代码行，

• 代码行tableModel.removeRow(rowID, rowIndex);有错误的参数

• 测试是否选择了任何行，否则选中的行返回-1

• 一切都可能只有

  @Override
  public void actionPerformed(ActionEvent e) {
      int rowToDelete = 0;
      int rowToModel = 0;
      if (table.getSelectedRow() > -1) {
          rowToDelete = table.getSelectedRow();
          rowToModel = table.convertRowIndexToModel(rowToDelete);
          model.removeRow(rowToModel);
      }
  }
  

• 请确保您的SelectionMode，否则您需要在所选行的数组中循环，

  table.getSelectionModel().setSelectionMode(
              ListSelectionModel.SINGLE_SELECTION);