 
 
                ParsePosition is a simple class used by 
Format
 and its subclasses to keep track of the current position during parsing.
 The 
parseObject method in the various 
Format
 classes requires a 
ParsePosition object as an argument.
 
 By design, as you parse through a string with different formats,
 you can use the same ParsePosition, since the index parameter
 records the current position.