郁闷的java程序问题

Java code

class ISBNFocusListener extends FocusAdapter{    public void focusLost(FocusEvent e)    {        if(!Dao.selectBookInfo(ISBN.getText().trim()).isEmpty());        {            JOptionPane.showMessageDialog(null,"添加书号重复");            return;                        }    }}                                                                          错误  错误 错误public static int Insertbook(String ISBN,String typeid,String         bookname,String writer,String translator,String publisher,Date date,Double price){    int i=0;    try    {        String sql="insert into bookinfo(ISBN,typeid,bookname,writer,translator,"+          "publisher,date,price)values('"+ISBN+"','"+typeid+"','"+bookname+"','"+writer+"'," +                  "'"+translator+"'," +                  "'"+publisher+"','"+date+"','"+price+"')";                  i=Dao.executeUpdate(sql);                                        //执行插入操作    }    catch(Exception e)    {        System.out.println(e.getMessage());    }    Dao.close();                                                                //关闭连接对象    return i;                                                                    //返回更新记录数}                            错误  错误 错误

第一个类的结尾的“}”错了，
第二个方法结尾的“}”错了
何解呀，
想不通为嘛错

[解决办法]
if(!Dao.selectBookInfo(ISBN.getText().trim()).isEmpty());
第一：麻烦这位兄弟把后面的;号去掉。
if后面是没有;的。
String sql="insert into bookinfo(ISBN,typeid,bookname,writer,translator,"+
"publisher,date,price)values('"+ISBN+"','"+typeid+"','"+bookname+"','"+writer+"'," +
"'"+translator+"'," +
"'"+publisher+"','"+date+"','"+price+"')";
i=Dao.executeUpdate(sql);
这里拼接字符串错了，你认真拼一下。