compositedocumentelement.java~3~

《深入浅出设计模式》的完整源代码

package document;
import java.util.*;

public abstract class CompositeDocumentElement implements DocumentElement {
  private Vector vector=new Vector();
  public abstract  void Draw() {
    for(int i=0;i<vector.size();i++)
    {
      ((DocumentElement)vector.elementAt(i)).Draw();
    }
  }

  public void Add(DocumentElement doc)
  {
    vector.add(doc);
  }
}