HashSet vs LinkedHashSet

Question

What is the difference between them? I know that

A LinkedHashSet is an ordered version of HashSet that maintains a doubly-linked List across all el

Answer 1

HashSet don't maintain the order of insertion item
LinkedHashSet maintain the order of insertion item

Example

Set set = ...;// using new HashSet<>() OR new LinkedHashSet<>()
set.add("2");
set.add("1");
set.add("ab");
for(String value : set){
   System.out.println(value);
}  

HashSet output

1
ab
2

LinkedHashSet output

2
1
ab