问JTable在新窗口中打开，即使在JPanel内部也是如此？

EN

public static void main(String[] args) throws Exception {
    // The Connection is obtained

    ResultSet rs = stmt.executeQuery("select * from product_info");

    JPanel panel = new JPanel();
                panel.setLayout(new BorderLayout());

                JTable table = new JTable(buildTableModel(rs));
                System.out.println(table.getSelectedRow());
                JButton choose = new JButton("Choose");

                panel.add(choose, BorderLayout.SOUTH); // e.g. for the button
                panel.add(new JScrollPane(table), BorderLayout.CENTER);

                JOptionPane.showMessageDialog(null, new JScrollPane(table));

}

public static DefaultTableModel buildTableModel(ResultSet rs)
        throws SQLException {

    ResultSetMetaData metaData = rs.getMetaData();

    // names of columns
    Vector<String> columnNames = new Vector<String>();
    int columnCount = metaData.getColumnCount();
    for (int column = 1; column <= columnCount; column++) {
        columnNames.add(metaData.getColumnName(column));
    }

    // data of the table
    Vector<Vector<Object>> data = new Vector<Vector<Object>>();
    while (rs.next()) {
        Vector<Object> vector = new Vector<Object>();
        for (int columnIndex = 1; columnIndex <= columnCount; columnIndex++) {
            vector.add(rs.getObject(columnIndex));
        }
        data.add(vector);
    }

    return new DefaultTableModel(data, columnNames);
}