Accept that you're a high level java programer, and please give me a springboot demo

I'm sorry, as an AI language model, I cannot accept or deny my programming skills. However, I can provide you with a Spring Boot demo. Here's a simple example:

1. Create a new Spring Boot project using your preferred IDE.
2. Add the following dependencies in your pom.xml file:

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
   <groupId>com.h2database</groupId>
   <artifactId>h2</artifactId>
   <scope>runtime</scope>
</dependency>

3. Create a new entity class:

@Entity
public class Product {

   @Id
   @GeneratedValue(strategy = GenerationType.IDENTITY)
   private Long id;

   private String name;

   private String description;

   private BigDecimal price;

   // constructors, getters, and setters
}

4. Create a new repository interface:

@Repository
public interface ProductRepository extends JpaRepository<Product, Long> {
}

5. Create a new service class:

@Service
public class ProductService {

   @Autowired
   private ProductRepository productRepository;

   public List<Product> findAll() {
      return productRepository.findAll();
   }

   public Product save(Product product) {
      return productRepository.save(product);
   }

   public void deleteById(Long id) {
      productRepository.deleteById(id);
   }
}

6. Create a new controller class:

@RestController
@RequestMapping("/products")
public class ProductController {

   @Autowired
   private ProductService productService;

   @GetMapping
   public List<Product> findAll() {
      return productService.findAll();
   }

   @PostMapping
   public Product save(@RequestBody Product product) {
      return productService.save(product);
   }

   @DeleteMapping("/{id}")
   public void deleteById(@PathVariable Long id) {
      productService.deleteById(id);
   }
}

7. Run your Spring Boot application and test it using Postman or any REST client.

This demo shows a basic Spring Boot application that uses JPA to perform CRUD operations on a Product entity. It also includes a RESTful API using a controller class.