Lecture 12 - prototyping prt 2

Question 1

how do we implement a generic search on a collection?

Answer 1

define an interface (public interface SimpleKey) which contains abstract method getKey. Another method - (public static ) method takes collection and key to seach. iterates through and returns result

Question 2

generic search for composite keys?

Answer 2

make sure each class involved implements SimpleKey. and search has , composite key is an interface

Question 3

what is persistence?

Answer 3

saving data between sessions?

Question 4

what persistence methods are used whilst prototyping?

Answer 4

ObjectOutputStream and ObjectInputStream - they allow us to write and read whole system object to file. (databases are used outside of prototyping)

Question 5

how do we implement the persistence methods?

Answer 5

make all classes implement serializable. main class has to have 2 static methods to write and read system object to file.