LinkedHashSet class
The LinkedHashSet class extends HashSet and adds no members of its own. It is a generic class that has this declaration:
class LinkedHashSet<E>
E specifies the type of objects that the set will hold. Its constructors parallel those in HashSet.
LinkedHashSet maintains a linked list of the entries in the set, in the order in which they were inserted.
This allows insertion-order iteration over the set.
Constructor
LinkedHashSet()- Creates a new, empty linked hash set with the default initial capacity (16) and load factor (0.75).
LinkedHashSet(Collection<? extends E> c)- Creates a new linked hash set with the same elements as the specified collection.
LinkedHashSet(int initialCapacity)- Creates a new, empty linked hash set with the specified initial capacity and the default load factor (0.75).
LinkedHashSet(int initialCapacity, float loadFactor)- Creates a new, empty linked hash set with the specified initial capacity and load factor.
import java.util.LinkedHashSet;
public class Main {
public static void main(String[] args) {
LinkedHashSet<Integer> lhashSet = new LinkedHashSet<Integer>();
System.out.println("Size of LinkedHashSet : " + lhashSet.size());
lhashSet.add(new Integer("1"));
lhashSet.add(new Integer("2"));
lhashSet.add(new Integer("3"));
System.out.println(lhashSet.size());
lhashSet.remove(new Integer("1"));
System.out.println(lhashSet.size());
}
}
The output:
Size of LinkedHashSet : 0
3
2