ADF Default Date as Sysdate

Go to Entity Object
Open Date Attribute which you want to Deafult as Sysdate
Click Value Type as Expression.
Value  adf.currentDate

For Timestamp adf.currentDateTime


import oracle.jbo.domain.Date;
..
protected Date getCurrentDate()
{
    return new Date( Date.getCurrentDate());
}
import oracle.jbo.Domain.Date;
import java.sql.Timestamp;
..
protected Date getCurrentDateWithTime()
{
    return new Date( new Timestamp( System.currentTimeMillis()));
}

http://abakalidis.blogspot.com/2007/02/oracle-adf-accessing-current-date-and.html



Date Validationshttp://mychanneladf.blogspot.com/2012/06/comparing-dates-and-displaying.htmlhttp://oracleanil.blogspot.com/2009/04/itemco.html