christinebronte / jpa Goto Github PK

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

@Column(name = "name")
private String name;

@Column(name = "salary")
private double salary;

// Constructors, getters, and setters

public static void main(String[] args) {
    EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("EmployeePU");
    EntityManager entityManager = entityManagerFactory.createEntityManager();

    EntityTransaction transaction = entityManager.getTransaction();
    transaction.begin();

    // Create a new employee
    Employee employee = new Employee();
    employee.setName("John Doe");
    employee.setSalary(50000.0);

    // Persist the employee object
    entityManager.persist(employee);

    transaction.commit();

    // Retrieve the employee object by ID
    Employee retrievedEmployee = entityManager.find(Employee.class, employee.getId());
    System.out.println("Retrieved Employee: " + retrievedEmployee.getName() + ", Salary: " + retrievedEmployee.getSalary());

    entityManager.close();
    entityManagerFactory.close();
}