/** Interface for simple shapes drawn on the screen using keyboard characters. */public interface ShapeInterface{    /**     Sets the offset for the shape.    */    public void setOffset(int newOffset);    /**     Returns the offset for the shape.    */	public int getOffset();    /**     Draws the shape at lineNumber lines down     from the current line.    */    public void drawAt(int lineNumber);    /**     Draws the shape at the current line.    */    public void drawHere();}