registeredClasses.put( Byte.class, new ByteValueConverter() ); registeredClasses.put( Byte.TYPE, new ByteValueConverter() ); registeredClasses.put( Character.class, new CharacterValueConverter() ); registeredClasses.put( Character.TYPE, new CharacterValueConverter() ); registeredClasses.put( Color.class, new ColorValueConverter() ); registeredClasses.put( Double.class, new DoubleValueConverter() );