package controleErro;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class TrabComErros extends javax.servlet.http.HttpServlet {
static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// TODO Auto-generated method stub
int x=10;
x = Integer.parseInt(request.getParameter("x"));
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<form action='TrabComErros' method='get'>");
out.println("X: "+"<input type='text' name='x'");
out.println("<input type='submit'>");
out.println("</form>");
//exibir o x
out.println(x);
} //end method
}//end class
Galera quando compilo essa servlet e executo é lançada uma erro:
SEVERE: Servlet.service() for servlet TrabComErros threw exception
java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at controleErro.TrabComErros.doGet(TrabComErros.java:19)
Fui informado que estava ocorrendo porque a variável x não tinha sido inicializada, porém a inicializei com 10 e continua dando o mesmo erro.
