public void loadData() {
Users u = new Users();
tb_Doctor.setModel(table);
try {
Vector v = u.getAllUser();
Vector rows = new Vector();
for (int i = 0; i < v.size(); i++) {
Users s = (Users) v.get(i);
rows.addElement(u.getUser());
rows.addElement(u.getPass());
rows.addElement(u.getroleID());
table.addRow(rows);
}

} catch (Exception ex) {
ex.printStackTrace();
}
}