CREATE TABLE `student` (
  `STUDENT_ID` INT(11) NOT NULL,
  `FIRST_NAME` VARCHAR(255) DEFAULT NULL,
  `LAST_NAME` VARCHAR(255) DEFAULT NULL,
  `AGE` INT(11) DEFAULT NULL,
  `ADDRESS` VARCHAR(255) DEFAULT NULL,
  PRIMARY KEY (`STUDENT_ID`)
 )
 CREATE TABLE `department` (
  `DEPT_ID` INT(11) NOT NULL,
  `DEPT_NAME` VARCHAR(255) DEFAULT NULL,
  PRIMARY KEY (`DEPT_ID`)
 )
 CREATE TABLE `course` (
  `COURSE_ID` INT(11) NOT NULL,
  `COURSE_NAME` VARCHAR(255) NOT NULL,
  `COURSE_FROM` TIME DEFAULT NULL,
  `COURSE_TO` TIME DEFAULT NULL,
  PRIMARY KEY (`COURSE_ID`)
 )
 CREATE TABLE `department_student` (
  `Student_id` INT(11) NOT NULL,
  `department_id` INT(11) NOT NULL,
  PRIMARY KEY (`Student_id`,`department_id`),
  KEY `FK_department` (`department_id`),
  CONSTRAINT `FK_department` FOREIGN KEY (`department_id`) REFERENCES `department` (`DEPT_ID`),
  CONSTRAINT `FK_student` FOREIGN KEY (`Student_id`) REFERENCES `student` (`STUDENT_ID`)
 )
 CREATE TABLE `student_course` (
  `Student_id` INT(11) NOT NULL,
  `Course_id` INT(11) NOT NULL,
  PRIMARY KEY (`Student_id`,`Course_id`),
  KEY `FK_course` (`Course_id`),
  CONSTRAINT `FK_student_for_student_course` FOREIGN KEY (`Student_id`) REFERENCES `student` (`STUDENT_ID`),
  CONSTRAINT `FK_course` FOREIGN KEY (`Course_id`) REFERENCES `course` (`COURSE_ID`)
 )

package com.javabrahman.reversegen;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.*;
 /**
 * POJO for Course generated by hbm2java
 */
 @Entity
 @Table(name = "course", catalog = "jb")
 public class Course implements java.io.Serializable {
  private int courseId;
  private String courseName;
  private Date courseFrom;
  private Date courseTo;
  private Set students = new HashSet(0);public Course() {
 }
 public Course(int courseId, String courseName) {
  this.courseId = courseId;
  this.courseName = courseName;
 }
 public Course(int courseId, String courseName, Date courseFrom,
Date courseTo, Set students) {
  this.courseId = courseId;
  this.courseName = courseName;
  this.courseFrom = courseFrom;
  this.courseTo = courseTo;
  this.students = students;
 }
 @Id
 @Column(name = "COURSE_ID", unique = true, nullable = false)
  public int getCourseId() {
  return this.courseId;
 }
 public void setCourseId(int courseId) {
  this.courseId = courseId;
 }
 @Column(name = "COURSE_NAME", nullable = false)
 public String getCourseName() {
  return this.courseName;
 }
 public void setCourseName(String courseName) {
  this.courseName = courseName;
 }
 @Temporal(TemporalType.TIME)
 @Column(name = "COURSE_FROM", length = 8)
 public Date getCourseFrom() {
  return this.courseFrom;
 }
 public void setCourseFrom(Date courseFrom) {
  this.courseFrom = courseFrom;
 }
 @Temporal(TemporalType.TIME)
 @Column(name = "COURSE_TO", length = 8)
 public Date getCourseTo() {
  return this.courseTo;
 }
 public void setCourseTo(Date courseTo) {
  this.courseTo = courseTo;
 }
 @ManyToMany(fetch = FetchType.LAZY, mappedBy = "courses")
 public Set getStudents() {
  return this.students;
 }
 public void setStudents(Set students) {
  this.students = students;
 }
}

package com.javabrahman.reversegen;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.*;
 /**
 * POJO for Student generated by hbm2java
 */
 @Entity
 @Table(name = "student", catalog = "jb")
 public class Student implements java.io.Serializable {
  private int studentId;
  private String firstName;
  private String lastName;
  private Integer age;
  private String address;
  private Set courses = new HashSet(0);
  private Set departments = new HashSet(0);
  
  public Student() {
  }
  public Student(int studentId) {
   this.studentId = studentId;
  }
  public Student(int studentId, String firstName, String lastName,
Integer age, String address, Set courses,
Set departments) {
   this.studentId = studentId;
   this.firstName = firstName;
   this.lastName = lastName;
   this.age = age;
   this.address = address;
   this.courses = courses;
   this.departments = departments;
  }
  @Id
  @Column(name = "STUDENT_ID", unique = true, nullable = false)
  public int getStudentId() {
   return this.studentId;
  }
  public void setStudentId(int studentId) {
   this.studentId = studentId;
 }
 @Column(name = "FIRST_NAME")
 public String getFirstName() {
  return this.firstName;
 }
 public void setFirstName(String firstName) {
  this.firstName = firstName;
 }
 @Column(name = "LAST_NAME")
 public String getLastName() {
  return this.lastName;
 }
 public void setLastName(String lastName) {
  this.lastName = lastName;
 }
 @Column(name = "AGE")
 public Integer getAge() {
  return this.age;
 }
 public void setAge(Integer age) {
  this.age = age;
 }
 @Column(name = "ADDRESS")
 public String getAddress() {
  return this.address;
 }
 public void setAddress(String address) {
  this.address = address;
 }
 @ManyToMany(fetch = FetchType.LAZY)
 @JoinTable(name = "student_course", catalog = "jb", joinColumns = { @JoinColumn(name = "Student_id", nullable = false, updatable = false) }, inverseJoinColumns = { @JoinColumn(name = "Course_id", nullable = false, updatable = false) })
 public Set getCourses() {
  return this.courses;
 }
 public void setCourses(Set courses) {
  this.courses = courses;
 }
 @ManyToMany(fetch = FetchType.LAZY)
 @JoinTable(name = "department_student", catalog = "jb", joinColumns = { @JoinColumn(name = "Student_id", nullable = false, updatable = false) }, inverseJoinColumns = { @JoinColumn(name = "department_id", nullable = false, updatable = false) })
 public Set getDepartments() {
  return this.departments;
 }
 public void setDepartments(Set departments) {
  this.departments = departments;
 }
}

package com.javabrahman.reversegen;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.*;
 /**
 * POJO for Department generated by hbm2java
 */
 @Entity
 @Table(name = "department", catalog = "jb")
 public class Department implements java.io.Serializable {
  private int deptId;
  private String deptName;
  private Set students = new HashSet(0);public Department() {
 }
 public Department(int deptId) {
  this.deptId = deptId;
 }
 public Department(int deptId, String deptName, Set students) {
 this.deptId = deptId;
 this.deptName = deptName;
 this.students = students;
 }
 @Id
 @Column(name = "DEPT_ID", unique = true, nullable = false)
 public int getDeptId() {
  return this.deptId;
 }
 public void setDeptId(int deptId) {
  this.deptId = deptId;
 }
 @Column(name = "DEPT_NAME")
 public String getDeptName() {
  return this.deptName;
 }
 public void setDeptName(String deptName) {
  this.deptName = deptName;
 }
 @ManyToMany(fetch = FetchType.LAZY, mappedBy = "departments")
 public Set getStudents() {
  return this.students;
 }
 public void setStudents(Set students) {
  this.students = students;
 }
}