pattern = new FormatNumberPattern( );
fmtPattern = new FormatNumberPattern( );
	private FormatNumberPattern getFmtPattern4Category( String category )	{		FormatNumberPattern pattern = null;		if ( categoryPatternMaps != null )		{			pattern = (FormatNumberPattern) categoryPatternMaps.get( category );		}		if ( pattern == null )		{// avoid null when categoryPatternMas is not initialized or the			// key(category) is not contained in the map.			pattern = new FormatNumberPattern( );		}		return pattern;	}