CareerCup

public interface Furniture 
{
	public String getFurnitureType();
}


public class SimpleFurniture implements Furniture{
	public String getFurnitureType() {
		return "Simple Furnitue";
	}
}

public abstract class FurnitureDecorator implements Furniture{
	
	protected Furniture simpleFurniture;
	
	public FurnitureDecorator() {
	}
	
	public FurnitureDecorator(Furniture f) {
		this.simpleFurniture = f;
	}
	
	public String getFurnitureType() {
		return simpleFurniture.getFurnitureType();
	}

}

public class Table implements Furniture {
	
	private Furniture fTable;
	
	public Table() { 
		
	}
	
	public Table(Furniture f) { 
		fTable = f;
	}
	
	public String getFurnitureType() {
		return fTable.getFurnitureType() + " Table Furniture ";
	}

}

public class TableWithWoodDecorator extends FurnitureDecorator{

	protected Furniture f;
	
	public TableWithWoodDecorator() {
	}
	
	public TableWithWoodDecorator(Furniture f1) {
		f = f1;
	}
	
	public String getFurnitureType() {
		return f.getFurnitureType() + " with wood";
	}
	
	
}

public class TestFurniture {

	public static void main(String[] args) {
		
		Furniture f = new TableWithWoodDecorator(new Table(new SimpleFurniture()));
		
		System.out.println(f.getFurnitureType());
		
		
	}
}

I would go with two base interface ,

IFurniture
{
void Init(IMaterial)
}

IMaterial
{
}

Now I will create furniture objects,

abstract class Chair : IFurniture
{
}

abstract Class Table : IFurniture
{
}

Class WoodMaterial : IFurniture
{
}

class SteelMaterial : IFurniture
{
}

Concrete classes

class WoodenChair:: Chair
{
Init(IMaterial material)
}

My response was to create a interface as material to generalize or to add material appropriate stuff in common for all classes instead of adding subclasses again and again.

You might be better off having furniture as an abstract base class and then Table and Chair as its subclass with an attribute of material.

abstract factory pattern

Furniture : Abstract Class
Furniture -> Table
Furniture -> Table -> IronTable
Furniture -> Table -> SteelTable
Furniture -> Chair
Furniture -> chair -> Woodchair
Furniture -> Chair-> Steel chair

1) Abstract Class Furniture {
Material material;
}
2) table extends furniture
3) chair Extends furniture

4) Material
5) Wood implements material;
6) Iron Implements material;

Strategy pattern can be used for this need.

How Strategy Pattern??? Can you elaborate?

Decorator pattern