difference between treemap and hashmap code example

Example 1: difference between treeset and treemap

TreeSet: Can contain only unique values and
it is sorted in ascending order
TreeMap: Can contain only unique keys and
keys are sorted in ascending order.

Example 2: treemap vs hashmap

- TreeMap doesn't have null key and keys are sorted
 Can contain only unique keys and keys are sorted in ascending order.
 
 v- HasHMap can have null key, order is not guaranteed