Help me Developers on sessionFacade and Business delegate

Question

Dear All What is the difference B/w sessionFacade and Business delegate pattern .I have gone through the tutorial.

Answer 1

hi,
quickly, interface describes (methods/functions of) Objects which implements it, while abstrat class contains 'working' methods/functions. If you have severals Objects that have the same methods/functions what all are implemented different ways, use interface. If some methods/functions do the same thing use abstract class.
simple example:
public interface Pet{
public String getName();
public String familly();
public abstract class AbstractPetImpl implements Pet{
private String name=null;
public AbstractPetImpl(String name){
this.name=name;
public String getName(){
return this.name;
public class Dog extends AbstractPetImpl{
public Dog(String name){
     super(name);
public String familly(){
return "I'm a dog";
public class Cat extends AbstractPetImpl{
public Cat(String name){
     super(name);
public String familly(){
return "I'm a cat";
public class Test{
public static void main(String args[]){
Pet a=new Cat("Kitty");
Pet b=new Dog("Rex");
System.out.println(a.getName());
System.out.println(a.familly());
System.out.println(b.getName());
System.out.println(b.familly());
hope this helps.