Question

I just wanted to know if I need to place a check for null at Point A below. Will it ever be null at that point? Or will it only be empty/non-empty?

Thx in advance for any help!

List myList = new ArrayList();
PreparedStatement ps = null;
ResultSet rs = null;
String sql ="SELECT * FROM XXXXX"; 

ps = getDBConnection.prepareStatement(sql);
rs = ps.executeQuery();

while (rs.next()) {
 //Add the row to myList using myList.add...
}

if (myList != null){ //POINT A
//Implement some logic
}

..

Answer 1

Your ArrayList is just a reference. It could in principle point to null, of course. In your example, however, you directly assign it to a new ArrayList() and nothing changes myList in between so, no, it can never be null