@FXML void browse(ActionEvent e){
        if(e.getSource() instanceof Button){
            switch(((Button)e.getSource()).getText()){
                case "mirna": tf_mirna.setText(showOpenDialog());break;
                case "gene": tf_gene.setText(showOpenDialog());break;
                case "interaction": tf_inter.setText(showOpenDialog());break;
            }
        }
    }