private class Hilo extends Thread {

    public void run() {
        String web_service = txtWs.getText();
        String token = txtToken.getText();
        boolean estado = true;
        while (true) {
            try {
                boolean validacion = controller.tokenValidacion(web_service, token);
                if (validacion == false) {
                    estado = false;
                    break;
                }

                //setVisible(false);
                controller_consulta.iniciar_proceso1();
                controller_consulta.iniciar_proceso2();

                Thread.sleep(20000);
            } catch (InterruptedException ex) {
                Logger.getLogger(formToken.class.getName()).log(Level.SEVERE, null, ex);
            }
        }

        if(!estado){
            setVisible(true);
        }
    }
}

Exception in thread "Thread-1" java.lang.ArrayIndexOutOfBoundsException: 0
    at Model.Consultar_insertar.iniciar_proceso(Consultar_insertar.java:25)
    at Controller.Controller_consultar.iniciar_proceso1(Controller_consultar.java:107)
    at Gui.formToken$Hilo.run(formToken.java:295)