对设计模式—Decorator模式的认识

今天星期一，上班迟到了，走到办公室打开电脑就工作，抽空学习一下Decorator模式，电脑慢了啊，怎么办啊，内存才1G，电脑里的元器件都是做好的，又不能优化，只好给它加条内存.

public interface Work 
{
   public void start();
}


public class ComputerWork implements Work 
{
    public void start() 
    {
	    System.out.println("Computer change fast!");
     }
}

//Add Memory function  
public class Decorator implements Work 
{

   private Work work;
   private List<String> memory = new ArrayList<String>();

   public Decorator(Work work) 
   {
       this.work = work;		
   }
    
   public void addNewMemory(String newMemory)
   {
       memory.add(newMemory);		
   }

   public void start() 
   {
       otherMemory();
       work.start();
   }

   public void otherMemory()
   {
      ListIterator<String> listIterator = memory.listIterator();
      while (listIterator.hasNext())
      {
	    System.out.println("Add Memory"+listIterator.next());
      }
    }
	

public class TestDecorator {
	@SuppressWarnings("unused")
	public static void main(String[]args)
	{
		Work computer= new ComputerWork ();
		Decorator decorator = new Decorator(computer);
		decorator.addNewMemory("add 1 G Memory");
		decorator.start();		
	}

}