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Call method on parent object

Posted on 2003-12-07
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Last Modified: 2010-03-31
I am having trouble calling a method on the parent object.

Right now, I have a class "DEM" that creates an instance of class "Decomposer"  The Decomposer object needs to call a method on DEM, so I call call the constructor from DEM like this:

  Decomposer d = new Decomposer(this);

on Decomposer, the constructor stores a reference to the parent

  private DEM Parent;
  public Decomposer(DEM parentRef){
    Parent = parentRef;
  }

when I try to call a method on the object Parent,
  ArrayList r = (ArrayList) Parent.executeGddQuery(lstrGetFragsSQL);

note: executeGddQuery is a public function on DEM (public List executeGddQuery(String query))

I get a compile error:
  csis532\dem\Decomposer.java:176: cannot resolve symbol
  symbol  : method executeGddQuery (java.lang.String)
  location: interface ddbms.DEM
               ArrayList r = (ArrayList) Parent.executeGddQuery(lstrGetFragsSQL);


Can someone help me to work out calling the parent object's method?

Thanks,
Mike
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Question by:mike_k
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3 Comments
 
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Expert Comment

by:objects
ID: 9893231
The method appears it is not defined in the DEM interface
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objects earned 2000 total points
ID: 9893234
>  private DEM Parent;

thange this to the actual class of the parent, or add the method to the DEM interface
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LVL 92

Expert Comment

by:objects
ID: 9893334
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