Java

public class  UniqueFieldValidator<T> implements ConstraintValidator<UniqueField,T> {

   @Override
   public boolean isValid(T value, ConstraintValidatorContext context)
   {
      EntityManagerFactory emf = Persistence.createEntityManagerFactory("project");   
      EntityManager em = emf.createEntityManager();
      
      String jpql = "select a from Author a where a.email = :pEmail";

      TypedQuery<Author> query = em.createQuery(jpql, Author.class);
      query.setParameter("pEmail", value);

      Optional<Author> optAuthor = Optional.of(query.getSingleResult());

      if(optAuthor.isPresent())
      {
         return false; 
      } 
      
      return true; 
   }
}

Hi I am developing a library management system in net-beans. When I run it on my system it works fine however, if try to run it on another system it gives me an error of javax.persistence.Persistence.createEntityManagerFactory("path_to_database_on_my_system"). But this path to database must be changed in this function. How would I do this? Need Help.

/**
 * Write a description of class Climber here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class Climber
{
    // Instance variables.
    // The climber name.
    private String name;
    // The climber age.
    private int age;
    // The climber gender.
    private String gender;
 
    /**
     * Constructor for objects of class Climber
     */
    public Climber(String newName, int newAge, String newGender)
    {
        // Initialise instance variables.
        name = newName;
        age = newAge;
        gender = newGender;
    }