POJO class

A POJO class is  simple java class with Setter & Getter   Methods but, it is  neither Implemented nor Extended from any Technology Specific Interface or Class Respectively.

Ex:                                                                                        
public class  a{                    
    //Setters & Getters                              
}                                              
class a  is POJO class.


 public class  b implements java.io.Serializable{
         //Setters & Getters
  }
class b  is POJO class(Because  of 'Serializable' is part of J2SE [not a Technology]).

 public class  b implements java.sql.Connection{
         //Setters & Getters
  }
class b is not POJO class(Because  of 'Connection' is part of JDBC Technology).


public class  c extends Thread{
         //Setters & Getters
  }
class c  is POJO class(Because  of 'Thread' is part of J2SE [not a Technology]).

public class  c extends HttpServlet{
         //Setters & Getters
  }
class c  is not POJO class(Because  of 'HttpServlet' is part of Servlet Technology]).