Problem with setBigDecimal method

[Emilio Fuoco]

Hi all,

I created a BigDecimal object with this method:

BigDecimal calibrate( String raw ){
return ( new BigDecimal( Integer.parseInt( raw ) * Math.pow( 2,-21 ) ).setScale( 21 ) );
}

After, I stored BigDecimal object value in the database (MySQL of course).
To do this I use this code:

LinkedList l = new LinkedList();
l.add( calibrate( "42714" ) );
...
...
preparedStatement.setObject( 1, l.get( 1 ), java.sql.types.DECIMAL, 21 );
...
...

Database column type is: numeric(22,21).
The problem is a precision lost.
Assume that BigDecimal object value is 0.02270412445068359375
In the database stored value is 0.022704124450683590000
I lost three digits !!

Can anyone help me?
Thanks.

Emilio