I'm building a web application using Spring framework and Hibernate with annotation and get stuck with a simple mapping between two entities.

I'm trying to create a many-to-many relationship between User and Course. I followed one of the Hibernate tutorials and my implementation is as follows:

User class:

@Entity
@Table(name="USER")
public class User {

    private Long id;
    private String email;
    private String password;
    private Set<Course> courses = new HashSet<Course>(0);


    @Id
    @GeneratedValue
    @Column(name="USER_ID")
    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }


    @Column(name="USER_EMAIL") 
    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    @Column(name="USER_PASSWORD")
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

    @ManyToMany(cascade = CascadeType.ALL)
    @JoinTable(name = "USER_COURSE", joinColumns = 
    { @JoinColumn(name = "USER_ID") }, 
    inverseJoinColumns = { @JoinColumn(name = "COURSE_ID") })
    public Set<Course> getCourses() {
        return courses;
    }

    public void setCourses(Set<Course> courses) {
        this.courses = courses;
    } 
}

Course class:

@Entity
@Table(name="COURSE")
public class Course {

    private Long id;
    private String name;

    @Id
    @GeneratedValue
    @Column(name="COURSE_ID")
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }

    @Column(name="NAME")
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }

}

The problem is that this implementation only allows me to go one way

user.getCourses()

What do I need to change, so I can go in both directions?

user.getCourses()
course.getUsers()

Any help would be appreciated.