PSQL Data Type: text vs. varchar(n)

I am having a problem with Sun Java Studio Creator because the latest
version of the JDBC driver returns a field length of -1 for text fields.

My question:  Is a text field just a varchar(Integer.MAX_VALUE)?  If I want
to use the data binding part of the SJSC tool I will need to convert my text
fields to some standard SQL data type.  I understand that varchar just
stores the actual length of the field, and not the padded white space.
Would anyone recommend for or against creating a field of
varchar(Integer.MAX_VALUE)?  Will PostgreSQL choke on that?  If against, how
is text implemented and how can I represent a variable-length String in a
SQL standard format?

Thanks.

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