Resultset Java Is Null. Here is an easy way to convert a Java ResultSet to a TableModel from which you can create a JTable thus. The only case in which a resultset will remain null is when an exception is thrown.
Initially cursor points to before the first row. Moreover the standard way to check whether a ResultSet is empty or not is to try setting its cursor to first row by using its first and if it returns false it indicates that ResultSet is empty. By default ResultSet object can be moved forward only and it is not updatable.
Retrieving the Value of a Column Using the Column Name.
Weve also created a function isNullOrEmpty which checks as the name suggests whether the string is null or empty. By default ResultSet object can be moved forward only and it is not updatable. Now when I try to extract data from this ResultSet the method will sometimes return null even though a previous ResultSetwasnull returns false. The default for ResultSetgetInt when the field value is NULL is to return 0 which is also the default value for your iVal declaration.