this.setCredits(this.creditsHidden.getValue().toString());
this.setCredits(Double.valueOf(this.creditsHidden.getValue().toString()));
    public void setCreditsHidden(HtmlInputHidden creditsHidden) {        if (this.creditsHidden != null) {            this.setCredits(this.creditsHidden.getValue().toString());        }        this.creditsHidden = creditsHidden;    }