Collection of Tips

Need to be unique?

Required: Set

Do you need to set the order?

Required: TreeSet

Not required: HashSet

But want a consistent order of storage (ordered): Linkedhashset

Not required: List

Do you need frequent additions and deletions?

Required: LinkedList

Not required: ArrayList

List

|--arraylist

|--linkedlist

Set

|--hashset

|--linkedset

The suffix name is the system to which the collection belongs.

The prefix name is the data structure of the collection.

Array: arrays, fast queries, angular labels

Link: list, add and delete fast, adding get Remove+first last method

Hash: Hash table, uniqueness, element requires overriding Hashcode method and Equals method

Tree: Two fork tree, sort, two interfaces comparable comparator two interfaces

Collection of Tips