org.hibernate.HibernateException: Javassist Enhancement failed

I was practicing a sample of hibernate to fetch data .I was encountered with an exception

INFO: HHH000327: Error performing load command : org.hibernate.HibernateException: Javassist Enhancement failed: com.practice.hibernate.Customer
Exception in thread "main" org.hibernate.HibernateException: Javassist Enhancement failed: com.practice.hibernate.Customer
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.getProxy(JavassistLazyInitializer.java:142)


Solution :

Please make sure that if you're overloading constructor in a class make a presence of actual empty argument constructor in it

in my case

Customer.java looks like

package com.practice.hibernate;

public class Customer {
 private int cid;
 private String name;
 private String city;
 private long phone;
 private double balance;
 
 public Customer(String name,String city,long phone,double balance) {
  
  
  this.name=name;
  this.city=city;
  this.phone=phone;
  this.balance=balance;
 }
 public int getCid() {
  return cid;
 }
 public void setCid(int cid) {
  this.cid = cid;
 }
 public double getBalance() {
  return balance;
 }
 public void setBalance(double balance) {
  this.balance = balance;
 }
 public long getPhone() {
  return phone;
 }
 public void setPhone(long phone) {
  this.phone = phone;
 }
 public String getCity() {
  return city;
 }
 public void setCity(String city) {
  this.city = city;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
}

To avoid the Exception i have modified the class a below

package com.practice.hibernate;

public class Customer {
 private int cid;
 private String name;
 private String city;
 private long phone;
 private double balance;
 public Customer() {
  // TODO Auto-generated constructor stub
 }
 public Customer(String name,String city,long phone,double balance) {
  // TODO Auto-generated constructor stub
  
  this.name=name;
  this.city=city;
  this.phone=phone;
  this.balance=balance;
 }
 public int getCid() {
  return cid;
 }
 public void setCid(int cid) {
  this.cid = cid;
 }
 public double getBalance() {
  return balance;
 }
 public void setBalance(double balance) {
  this.balance = balance;
 }
 public long getPhone() {
  return phone;
 }
 public void setPhone(long phone) {
  this.phone = phone;
 }
 public String getCity() {
  return city;
 }
 public void setCity(String city) {
  this.city = city;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
}