I have to use the public static String vetor[] = new String [15]; vector in the class ... however this class is used in a servlet. And the size I need the vector is what the user chooses ... how can I pass the parameter that defines the vector size. I know that this 15 is only representative ... I need a variable, but how to declare a vector of the class using a variable that comes from the servlet?
Change class vector size
1
asked by anonymous 02.10.2014 / 15:46
2 answers
5
You can solve this by instantiating the vector in the class constructor and receiving the size as an argument:
public class Teste
{
public static String vetor[];
...
public Teste(int tamanhoVetor)
{
vetor = new String [tamanhoVetor];
}
}
In Servlet could be something like (the way to get the value may be different):
...
Teste testando = new Teste(Integer.valueOf(request.getAttribute("txtTamanho").toString()));
...
02.10.2014 / 15:50
1
I do not know if you are working with JSP, but if you are, you need to use the Request for this
request.setAttribute("key", "valor") //set uma variavel de request
RequestDispatcher rd = request.getRequestDispatcher("/teste.jsp");
rd.forward(request, response);
String valor = (String) request.getAttribute("key"); //pega o request na sua classe jsp
String meuArray[] = new String[valor]; //Set o valor passado no seu Array =)
02.10.2014 / 15:56