Trouble converting Java examples to Oxygene using inherited in classes

[paul_nicholls]

I tried to convert the first Java example from here:
http://home.cogeco.ca/~ve3ll/jatutorg.htm

This is my code:

namespace platformation;

interface
uses
  java.awt,
  javax.swing;

type
  GFrame = public class(JFrame)
  public
    constructor(); 
    class method main(arg: array of String);
  end;
  GCanvas = public class(Canvas)
  public
    method paint(g: Graphics); override;
  end;

implementation

constructor GFrame();
begin
  inherited ('Graphics Demo');
  setBounds(50, 50, 300, 300);
  //  set frame
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  var con: Container := self.getContentPane();
  //  inherit main frame
  con.setBackground(Color.white);
  //  paint background
  var canvas: GCanvas := new GCanvas();
  //  create drawing canvas
  con.&add(canvas);
  setVisible(true)
end;

class method GFrame.main(arg: array of String);
begin
  new GFrame()
end;

method GCanvas.paint(g: Graphics);
begin
end;

end.

When I compile the project, it complains on this line:

 inherited ('Graphics Demo');

Error	1	(E105) Cannot invoke non-delegate type "javax.swing.JFrame"	C:\Shared\My Dropbox\Oxygene for java\projects\platformation\platformation\Program.pas	23	3 platformation

Any ideas how to fix this sort of error?

cheers,
Paul

[pstudio]

inherited constructor ('Graphics Demo');

[paul_nicholls]

Thanks mate, that worked