@Entity
@Table(name = "T_STUDENT")
public class Student {
	@Id
	@GeneratedValue(strategy = GenerationType.SEQUENCE)
	@Column(name = "student_id")
	private Long studentId;
 
	@Column(name = "student_name", nullable = false, length = 50)
	private String studentName;
 
	@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
	@JoinTable(
			name = "T_STUDENT_COURSE",
			joinColumns = {@JoinColumn(name = "student_id")},
			inverseJoinColumns = {@JoinColumn(name = "course_id")})
	private Set<Course> courses = new HashSet<Course>(0);
 
	// setter and getter
}

@Entity
@Table(name = "T_COURSE")
public class Course {
 
	@Id
	@GeneratedValue
	@Column(name = "course_id")
	private Long courseId;
 
	@Column(name = "course_name", nullable = false)
	private String courseName;
 
	// setter and getter
}

@Entity
@Table(name = "T_STUDENT_COURSE")
public class StudentCourse {
 
	@Id
	@GeneratedValue(strategy = GenerationType.SEQUENCE)
	@Column(name = "student_course_id")
	private Long id;
 
	@Column(name = "last_updated")
	private Date lastUpdated;
 
	private boolean active = false;
 
	@ManyToOne
	@JoinColumn(name = "student_id")
	private Student student;
 
	@ManyToOne
	@JoinColumn(name = "course_id")
	private Course course;
 
	// setter and getter
}

Student student = new Student();
student.setStudentName("Kiki");
trainingService.save(student);
 
StudentCourse studentCourse = new StudentCourse();
studentCourse.setStudent(student);
studentCourse.setCourse(trainingService.getCourseById(200L)); // ambil data course telah ada di DB 
studentCourse.setActive(true);
studentCourse.setLastUpdated(new Date());
trainingService.save(studentCourse);
 
studentCourse = new StudentCourse();
studentCourse.setStudent(student);
studentCourse.setCourse(trainingService.getCourseById(300L)); // ambil data course telah ada di DB 
studentCourse.setActive(false);
studentCourse.setLastUpdated(new Date());
trainingService.save(studentCourse);