19.7. ResultSet Interface

Try these first

1. 1.

   What does the next() method in ResultSet do?

   Hint

   Think about moving through rows one by one.

2. 2.

   Is getString() used to retrieve integer values?

   Hint

   Consider the name of the method and the data type.

3. 3.

   What is the purpose of the ResultSet interface in JDBC?

   • To execute SQL statements
   • To process data retrieved from database queries
   • To establish database connections

   Hint

   Think about where we work with data from queries.

4. 4.

   True or False: The method next() moves the cursor in the ResultSet to the previous row.

   • True
   • False

   Hint

   Consider the direction of the cursor movement.

5. 5.

   Write a complete JDBC program that retrieves student data using ResultSet and handles potential exceptions.

   Hint

   Use try-with-resources for automatically closing resources.

6. 6.

   Suppose a student table has a column called 'email' that should be string but is being accessed with getInt(). Write a code snippet that would handle the exception appropriately.

   Hint

   Always anticipate possible exceptions, especially when accessing columns with the wrong data type.