LinkedHashSet in Java is a concrete class that implements set interface and extends HashSet class with a doubly linked list implementation. It internally uses a linked list to store the elements in the set. It was added in Java 1.4 version. Java LinkedHashSet class is the same as HashSet class, … Read more
A TreeSet in Java is another important implementation of the Set interface that is similar to the HashSet class, with one added improvement. It sorts elements in the ascending order while HashSet does not maintain any order. Java TreeSet implements SortedSet interface. It is a collection for storing a set … Read more
We have known in the previous tutorial, a map in java is a container object that stores elements in the form of key and value pairs. If the key is provided, its associated value can be retrieved easily. Keys must be unique. Now we will learn in this tutorial how … Read more
A map in Java is a container object that stores elements in the form of key and value pairs. A key is a unique element (object) that serves as an “index” in the map. The element that is associated with a key is called value. A map stores the values … Read more
In this tutorial, we will learn how to iterate Set in Java. Set interface does not provide any get() method like the List interface to retrieve elements. Therefore, the only way to take out elements from the set can be by using Iterator() method but this method does not return … Read more
The collections framework provides two general-purpose set implementations in Java: HashSet and TreeSet. In this tutorial, we will learn HashSet in Java with example programs in an easy way. HashSet class was introduced in Java 1.2 version and it is present in java.util.HashSet package. It internally uses HashMap to store … Read more
In the last tutorial, we have discussed Java LinkedList and its various methods. In this tutorial, we will learn how to iterate LinkedList in Java. Before going on this topic, I will recommend that you first learn the basics of LinkedList in Java then come on this topic. There are … Read more