Whta is wrong im my code ?

Question

I have had some problems to connect a data base . can you help me?
try
double RG = Double.valueOf((requisicao.getParameter("rg"))).doubleValue();// pegando do formulario
/*Coneccao com o banco*/
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String url="jdbc:odbc:eleicoes";
String username = "";
String password = "";
PrintWriter naPagina = resposta.getWriter();
String querybuscaexcluidos="select rg from excluidos where rg="+RG+"";
String querybuscacadastrados="select rg from cadastro";
String queryinserir="insert into excluidos (rg) values (\"&RG&\")";
String queryapagar="delete from cadastro where rg = \"&RG&\"";
Connection con = DriverManager.getConnection(url,username,password);
Statement query = con.createStatement();
ResultSet Objreg = query.executeQuery(querybuscaexcluidos);
ResultSet ObjregDois;
/*Coneccao com o banco*/
if (Objreg.next())
resposta.sendRedirect("http://127.0.0.1:8080/erro.htm");
else
ObjregDois = query.executeQuery("select rg from cadastro where rg="+RG+"");
if (Objreg.next())
ObjregDois = query.executeQuery(queryinserir);
ObjregDois = query.executeQuery(queryapagar);
resposta.sendRedirect("http://127.0.0.1:8080/sucessoapagar.htm");
else
resposta.sendRedirect("http://127.0.0.1:8080/erro.htm");
Objreg.close(); //fechando transportador de dados
con.close();
}// fim try
catch(SQLException ex)
}// fim catch
catch(ClassNotFoundException ex)
}// fim catch

Answer 1

Are you getting an error or it just won't connect to the database? do you have a dsn set up for the database in the ODBC Administrator?