What is an entity in Hibernate 7 and how do you define one?

An entity is a Java class mapped to a database table. Each instance corresponds to a row. In Hibernate 7, entity classes follow Jakarta Persistence 3.2 rules.

import jakarta.persistence.*;

@Entity
@Table(name = "products")
public class Product {

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

    @Column(name = "product_name", nullable = false, length = 200)
    private String name;

    @Column(precision = 10, scale = 2)
    private BigDecimal price;

    @Enumerated(EnumType.STRING)  // store as 'ACTIVE' not 0/1
    private ProductStatus status;

    protected Product() {}  // JPA proxy constructor
    public Product(String name, BigDecimal price) {
        this.name = name;
        this.price = price;
        this.status = ProductStatus.ACTIVE;
    }
}

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