HashMap is a class that implements the Map interface. A map stores data in the Key-Value pair. HashMap uses the same technique to store values. Class: HashMap Interface: Map Package: java.util We can never lose any data as we are tagging each element with a key. While using an index we can lose data becauseRead More
Interface
Collection-3 || LinkedList Class implementation and usage.
In LinkedList objects are stored as a node in a List. Each node is divided in three parts: Address of Previous node, Data of the node, Address of Next node. Review features of ArrayList It is a resizable array which increases the array size whenever we add new items in the list. The default sizeRead More
Collection-2 || Use of ArrayList Class in Java.
ArrayList Class implements List Interface. In the last chapter, we have read about all the classes and their features as well as limitations. Now, we will understand all these concepts at the code level. Class: ArrayList Interface: List Package: java.util Key points of ArrayList Stores objects as a list of elements and Any number of elements canRead More
Collection-1 || Types and features of Collection in Java.
The Collection is a root Interface which contains other Interfaces like List, Queue, Map and Set. These Interfaces further contains Classes or sub-interfaces. Facts about Collection All these Classes and Interfaces make a framework structure to create a list of objects(like String, Integer, etc). It also provides common methods/features to handle and manipulate these underRead More
Java | Object Oriented Programming (OOPs) Concept
Object Oriented Programming is a concept based on class and objects. A Class is like a repository which contains all data members and methods. On the other hand, an Object is an instance of a class which acquires all the properties(data members) and behavior(methods) of the class. OOPs, conceptsRead More
