LinkedHashSet Properties
✓Insertion order is preserved
✓Duplicates are not allowed
✓ only one null value is allowed
✓ It is not indexed type.
✓ Underlying Data Structure is LinkedList and HashTable.
ex:
public class LinkedHashSet {
public static void main(String[] args) {
LinkedHashSet<String> lh = new LinkedHashSet<String>();
lh.add("java");
lh.add("sql");
lh.add("css");
lh.add("java");
Iterator<String> i=lh.iterator();
while(i.hasNext()) {
System.out.println(i.next());
}
}
}
Output :
java
sql
css