question: public AbstractPointRenderer ( ) { shape = new Rectangle2D . Double ( - 2.5 , - 2.5 , 5.0 , 5.0 ) ; color = new SingleColor ( Color . BLACK ) ; valueVisible = false ; valueColumn = 1 ; valueLocation = Location . CENTER ; valueAlignmentX = 0.5 ; valueAlignmentY = 0.5 ; valueRotation = 0.0 ; valueDistance = 1.0 ; valueColor = new SingleColor ( Color . BLACK ) ; valueFont = Font . decode ( null ) ; errorVisible = false ; errorColumnTop = 2 ; errorColumnBottom = 3 ; errorColor = new SingleColor ( Color . BLACK ) ; errorShape = new Line2D . Double ( - 2.0 , 0.0 , 2.0 , 0.0 ) ; errorStroke = new BasicStroke ( 1f ) ; }
target:  Creates a new AbstractPointRenderer object with default shape and color.