1 @Entity 2 @Table(name = "student") 3 public class Student { 4     @Id 5     @Column(name = "id") 6     @GenericGenerator(name = "generator",strategy = "native") 7     @GeneratedValue(generator = "generator") 8     private int id; 9     10     @Column(name = "name")11     private String name;12     13     14     @ManyToMany(cascade = CascadeType.ALL,fetch = FetchType.LAZY)15     @JoinTable(name = "student_course",16                joinColumns= {@JoinColumn(name = "student_id")},17                inverseJoinColumns = {@JoinColumn(name = "course_id")})18     private Set<Course> courses = new HashSet<Course>();19     20 }

@Entity@Table(name = "course")public class Course {    @Id    @Column(name = "id")    @GenericGenerator(name = "generator",strategy = "native")    @GeneratedValue(generator = "generator")    private int id;        @Column(name = "coursename")    private String courseName;        @ManyToMany(cascade = CascadeType.ALL,fetch = FetchType.LAZY,mappedBy = "courses")    private Set<Student> students = new HashSet<Student>();    }