I have a class on /lib, here is:

package auxiliar;

public class Tabla {
public String oid;
public String ip;
public int frecuencia;
public int inicio;
public int fin;

public Tabla (String oid, String ip, int frecuencia, int inicio, int fin) {
this.oid = oid;
this.ip = ip;
this.frecuencia = frecuencia;
this.inicio = inicio;
this.fin = fin;
}
}




And then I have a bean like about this:

public class VerOid {


.......
public ArrayList ver () {
.......

ArrayList salida = new Arraylist();
...
while( rs.next() ) {
salida.add(new Tabla(_oid, _ip, _frecuencia, _inicio, _fin));
......




And at last, I have a JSP like this:

<jsp:useBean id="id1" scope="session" class="bean.VerOid"/>

<%


ArrayList d = id1.ver();

out.println( d.size());


///////////

out.println( ( (Tabla) (d.get(0)) ).oid );
////////



ArrayList ff = new ArrayList();
ff.add(new Tabla ("1.1.","127.",3,4,5));

out.println( ( (Tabla) ff.get(0) ).frecuencia );





%>

d.size no problem
With ff neither.

But out.println( ( (Tabla) (d.get(0)) ).oid ); thrown an exception java.lang.ClassCastException and I don't know why.

I have JDK 1.4.