链表的add不执行也不报错

Question

求大神解答，products是范型为Product的List，执行到products.add(product)的时候总是停下，也不报错，这是什么原因啊？

Answer 1

Product product = new Product();
        product = gDao.get(Product.class, sql, id);
        String attrnameids = product.getAttrname();
        String []attrnameids2 = attrnameids.split("#");
        for(int i=0;i<attrnameids2.length;i++)
        {
            description += gDao.qureystr(sql3, attrnameids2[i])+"，";
        }

        description = description.substring(4, description.length()-1);
        product.setDescription(description);

        int fid = product.getFid();
        String fname = gDao.qureystr(sql2, fid);
        product.setFactory(fname);

        String pic = path+product.getPic();
        product.setPic(pic);

        product.setCount("1");

        System.out.println("4");
        products.add(product);
        System.out.println("6");
        session.setAttribute("products", products);