Hi I am calling derby within a larger java program....................
Step1: I allocate a database "Connection" object Step2: I allocate a "Statement" object in the connection Step 3: I execute a SQL SELECT query, the query result is returned in a "ResultSet" object so far so good (I update the latest database record, I add a new record and I delete the oldest record I then call a data mining program [Weka] I setup a few Weka models etc...... I then wish to look at the last 100 records in my database, one at a time The code I have currently is as follows:- *********************** try { Statement s = null; ResultSet rs = null; rs = s.executeQuery ("SELECT".................); int k = 0 while (k < 101) { rs.next(); ... ... } k++; } } catch (Exception e) { myConsole.getOut().println(e); } I get the following error:- java.lang.NullPointerException do I need to do something further to read my 100 records? Bob M -- View this message in context: http://apache-database.10148.n7.nabble.com/accessing-records-problem-tp136964.html Sent from the Apache Derby Users mailing list archive at Nabble.com.