Using UML to write examples of Java design Patterns FactoryMethod pattern

Design excerpt from a long time college
Read the article on the Forum, reading FactoryMethod pattern UML diagram, wrote a small example program. As a supplement to the article!
Creator.java

Public abstract class Creator
{
/**
* Looks like a factory
* contains some products and some process methods
*/
protected Product duct;
Abstract String processproduct ();
Abstract String processproductspecial ();
Public String Operation ()
{
return processproduct (); FactoryMethod for Implemention;
}
}

Concreteproduct.java

public class Concreteproduct extends Product
{
Public Concreteproduct ()
{
System.out.println ("Construct the Concreteproduct object");
}
public string makestring (String str)
{
Return ' This is the ' product after processing: ' +str;
}
}

Product.java
Public abstract class Product
{
Public abstract string makestring (String str);
}

Concretecreatora.java

public class Concretecreatora extends Creator
{
/**
* You can write some the other class like this to override
* The same methods do diffrent thing;
*/
Public Concretecreatora ()
{
Duct=new concreteproduct ();
System.out.println ("instanced a Product");

}
Public String processproduct ()
{
SYSTEM.OUT.PRINTLN ("Product A:");
Return duct.makestring (' Make @ #a product ');

}
Public String processproductspecial ()
{
SYSTEM.OUT.PRINTLN ("Special product B:");
Add another method here
Return duct.makestring (' Make Special @ #B product ');
}
}



Testfactorymethod.java
public class Testfactorymethod
{
Public Testfactorymethod ()
{
}
public static void Main (string[] arg)
{
Concretecreatora cc=new Concretecreatora ();
System.out.println (CC. Operation ());
System.out.println (Cc.processproductspecial ());
}
}