how to serialize HashSet

Question

i'm building an android app and i want to add a history function. I heard that i can serialize a list to be able to save and retrieve data instead of using a Database, i have no idea how it works so i come here and ask for advice, is there somewhere i could get started with this. Some good links could be useful.

Thanks

Answer 1

HashSet implements Serializable. So as long as all the objects you put inside your hash set also implements Serializable (and all objects inside them again etc.), you can serialize it as any other normal serializable java object.