Visitor Pattern in Java

For the code demo in Java, we'll be recreating the demo from the deep dive of a museum and its exhibits being visited by different patrons.

// Our museum interface that accepts visitors to it:
public interface MuseumExhibit 
{
   void accept(Visitor v);
   String getName();
}

public class Painting implements MuseumExhibit 
{
   public String getName() {
       return "Sunday Afternoon";
   }

   public void accept(Visitor v) {
       v.visit(this);
   }
}

public class Sculpture implements MuseumExhibit 
{
   public String getName() {
       return "Contemplating Person";
   }

   public void accept(Visitor v) {
       v.visit(this);
   }
}

public class Artifact implements MuseumExhibit 
{
   public String getName() {
       return "Ancient Tablet";
   }

   public void accept(Visitor v) {
       v.visit(this);
   }
}

// Our visitor interface with the types of visits we can accomplish:
public interface Visitor 
{
   void visit(Painting painting);
   void visit(Sculpture sculpture);
   void visit(Artifact artifact);
}

// Our art critic:
public class ArtCritic implements Visitor 
{
   public void visit(Painting painting) {
       System.out.println("The critic inspects " + painting.getName() + " very closely");
   }
   public void visit(Sculpture sculpture) {
       System.out.println("The critic admires the form of " + sculpture.getName());
   }
   public void visit(Artifact artifact) {
       System.out.println("The critic isn't sure what to think of the " + artifact.getName());
   }
}

// Our historian, more interested in artifacts than art:
public class Historian implements Visitor 
{
  public void visit(Painting painting) {
       System.out.println("The historian enjoys looking at " + painting.getName());
   }
   public void visit(Sculpture sculpture) {
       System.out.println("The historian is perplexed by " + sculpture.getName());
   }
   public void visit(Artifact artifact) {
       System.out.println("The historian estimates the age of the " + artifact.getName());
   }
}