java.lang.NumberFormatException: For input string: ""
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
	at java.lang.Integer.parseInt(Integer.java:447)
	at java.lang.Integer.<init>(Integer.java:567)
	at dimaxweb.dades.FuncionsDades.<init>(FuncionsDades.java:254)
	at dimaxweb.Pagina.service(Pagina.java:152)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:782)
	at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:330)
	at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:794)
	at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:208)
	at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:125)
	at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
	at java.lang.Thread.run(Thread.java:536)