Define an interface GUIComponent consisting of four method declaration: open: void-returning, accepts no parameters close: both accepts no parameters, return boolean indicating whether or not the component is willing to be closed at that point (for example, a text window might have unsaved data and should not be closed) resize: void-returning accepts new width and height (integers) in that order move: void returning, accepts new x and y positions (in that order) respectively

interface GUIComponent{

  public void open();

  public boolean close();

  public void resize(int width, int height);

  public void move(int x, int y);

}

Explanation:

since it can be assumed that what aslam is making is a template by compiling all the commonly used excel formatting in several worksheets in an excel document, aslam can choose to save it using the .xltx or .xltm format instead. thus, aslam can distribute the templates he has made to his team members in an easier manner.