question: private void initTreeMap ( ) { if ( entityType == null ) { entityType = "Mouse" ; } if ( entityType . equalsIgnoreCase ( "Circle" ) ) { imageMap = RotatingEntityManager . getCircle ( ) ; } if ( entityType . equalsIgnoreCase ( "Mouse" ) ) { imageMap = RotatingEntityManager . getMouse ( ) ; } else if ( entityType . equalsIgnoreCase ( "Amy" ) ) { imageMap = RotatingEntityManager . getRotatingTileset ( "amy" , 20 ) ; } else if ( entityType . equalsIgnoreCase ( "Arnold" ) ) { imageMap = RotatingEntityManager . getRotatingTileset ( "arno" , 20 ) ; } else if ( entityType . equalsIgnoreCase ( "Boy" ) ) { imageMap = RotatingEntityManager . getRotatingTileset ( "boy" , 20 ) ; } else if ( entityType . equalsIgnoreCase ( "Cow" ) ) { imageMap = RotatingEntityManager . getRotatingTileset ( "cow" , 25 ) ; } else if ( entityType . equalsIgnoreCase ( "Girl" ) ) { imageMap = RotatingEntityManager . getRotatingTileset ( "girl" , 20 ) ; } else if ( entityType . equalsIgnoreCase ( "Lion" ) ) { imageMap = RotatingEntityManager . getRotatingTileset ( "lion" , 15 ) ; } else if ( entityType . equalsIgnoreCase ( "Susi" ) ) { imageMap = RotatingEntityManager . getRotatingTileset ( "susi" , 20 ) ; } else if ( entityType . equalsIgnoreCase ( "Jake" ) ) { imageMap = RotatingEntityManager . getRotatingTileset ( "jake" , 20 ) ; } else if ( entityType . equalsIgnoreCase ( "Steve" ) ) { imageMap = RotatingEntityManager . getRotatingTileset ( "steve" , 20 ) ; } update ( ) ; }
target:  Initialize the tree map, which associates angles with images / animations.