将一个表的组件映射为另一个表中的ArrayList作为OneTomany

我正在将JPA与Hibernate Persistence Manager结合使用。

我有两个班, 库LoanSystem.java 和 用户.java .

库LoanSystem.java

 @Entity
    public class LibraryLoanSystem {

        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        private Integer idOfLLS;

        @Transient
        private ArrayList<Loan> loans = new ArrayList<Loan>();

        @Transient
        private ArrayList<Loanable> loanables = new ArrayList<Loanable>();

        @OneToMany
        @JoinTable(name = "USER" , joinColumns = @JoinColumn(name = "studentId"))
        private ArrayList<User> users = new ArrayList<User>();

        @Transient
        private ObservableList<Material> materialData = FXCollections.observableArrayList();

        public LibraryLoanSystem() {

            populateUsers();
            populateMaterials();
        } //getters,setters and methods

用户.java

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

    /* Name of the User */
    @Column(name = "name", nullable = false)
    private String name;

    /* Date of Birth for the User */
    @Column(name = "dateOfBirth",nullable = false)
    private LocalDate dateOfBirth;

    /* Student ID of the User */
    @Id
    @Column(name = "studentId", updatable = false, nullable = false)
    private String studentId;
//constructor,getters & setters

基本上, ArrayList用户 在库中,LoanSystem是系统中所有用户的列表,也就是说。用户表行中的所有用户记录。这两个Java类具有它们之间的聚合关系,OntoMoNe,具有多个用户但用户只有一个系统的LabyLoad系统。我不确定如何绘制地图,我得到

非法尝试将非集合映射为@OneTomany,@ManyToMany 或@collectionfelements:controller.libraryLoanSystem.users

在我的尝试中。如何正确映射这个数组列表?谢谢