1. null results coderanch.com |
2. null object in result sets coderanch.comhey everyone , i have a simple question about result in a result set that gives back null , if my code looks like this : System.out.println("Street : " + rs.getString("STREET")); output (it actually writes 'null'): " Street : null "; i don't want it to happen , i wish to it like this ... output: " Street : "; if(rs.getStreet("STREET") ... |
3. How do you check is Result set is null coderanch.comif (rs != null) { out.println("result set has got something"); while (rs.next()) { //I am processing result set now } } else { out.println("result set is empty"); } IS THIS CORRECT WAY TO CHECK IF RESULT SET IS EMPTY, FOR ME EVEN THOUGH RESULT SET IS EMPTY IT IS GOING INTO FIRST BLOCK AND PRINTING RESULT SET HAS GOT SOMETHING. CAN ... |
4. result null is null(urgent help) coderanch.comWith regards to the code from Hrithik Roshan, the first version is wrong (it will detect if there aren't any results correctly, but if there it discards the first result!) and the second returns the number of rows inserted... Maybe what you want is more like: if(rs==null) { System.out.println("ResultSet was null. That was unexpected!"); } else if(rs.next()) { //there were results ... |
5. Why this goes into do...while with null result set? coderanch.comI have a do...while that's giving me a weird problem. I have multiple resultsets returned to a statement, and so I get the first one in the "do" by calling getResultSet(), then I do what I need with it and then have a while statement that checks "getMoreResults() and "getUpdateCount()". However, I always have the last time through where it gets ... |
6. how to handle result set = null coderanch.comDatabase was set up prior to me coming on board. If the data exists, it is loaded into the database table otherwise it is left off. No flags. For example, we have a users table and we have a cars table. If a user has a car, then the user_id is on the car table. If a user does not have ... |
7. Handling null numeric values in a result set coderanch.comI'm trying to write a generic object factory class that I can run against a database table and produce an object with a constructor, getters, setters and methods to test if values have changes and to save changes to the table. I've always been a little weak on how to handle numeric values, since the jdbc getters (getInt, getDouble, etc) return ... |