Determining the size of a file on the Internet seems a little tricky, but it is a quite simple and easy task. Java provides some built-in features that can be used for the given task. In this article, we will discuss how to make a connection to the Internet and fetch the size of a given file. How to establish a Connection on Internet using Java URL The modern Internet is all about World Wide Web. Tim Berners-Lee invented a way to locate all the resources on Web and he named it Uniform Resource Locator. It provides the feature ... Read More

Spring is the most famous Java Web Framework available nowadays. It serves to build web applications through Java programming language. To work with this framework one needs to have a strong background and understanding of Java. It is essential to protect our valuable data from unethical practices. In this article, we will walk through some important terms in Spring Security that helps us in protecting users’ data. We won’t go into a deep analysis of any terminology. Terms related to Spring Security The Spring Security is an open source security framework and serves as a comprehensive security solution for your ... Read More

To enable communication between devices over the Internet, we use Internet Protocol suite. The UDP is one of the protocols of this suite and its full form is User Datagram Protocol. Unlike TCP, it is not reliable and also it is a connection less protocol. It does not establish any kind of connection to other devices before sending the data. In this article, we will develop a simple client-server side calculator using UDP in Java. The client will request the operation and the server will send the result to client device after calculating it. But first, let's briefly understand a ... Read More

The Internet Protocol suite contains all sort of protocols that enables communication between devices over the Internet. TCP is a connection-oriented protocol, which means it maintains the established connection between two devices till the end of a communication. This is the reason it is used while web surfing, sending emails and transferring files. In this article, we will develop a simple client-server side calculator using TCP in Java. The client will request the operation and the server will send the result to client device after calculating it. Java Networking Let's briefly understand a few basic concepts about Java networking that ... Read More

There are two types of Collections in Java. One is ordered and the other one is unordered collection. The ordered collections store their elements in the order in which they are inserted i.e. it maintains the insertion order of elements. Whereas, the unordered collections such as Map and Set do not maintain any order. In this article, we will create an unordered collection and try to shuffle its elements using the inbuilt method Collections.shuffle(). The Collections.shuffle() Method The Collections.shuffle() method is provided by java.util package. It takes a list as an argument and then rearranges the elements randomly. Therefore, before ... Read More

In Java, downcasting is the process of converting an object of parent class to object of child class. We need to perform the conversion explicitly. It is quite similar to what we do in primitive typecasting. In this article, we will learn about downcasting and what are the rules that we must follow to downcast an object in Java. There is one more concept for modifying objects named Upcasting. In this process, the object of sub class gets converted to super class object. It can be done implicitly. Both the concepts, upcasting and downcasting together called object casting. Object Downcasting ... Read More

Vectors implement the List interface and are used to create dynamic arrays. The array whose size is not fixed and can grow as per our needs is called as a dynamic array. The vectors are very similar to ArrayList in terms of use and features. In this article, we will learn how we can create a vector and search for a particular element by its index in Java. Let's discuss Vector first. Java Vector Vector is similar to ArrayList in many ways but there exist some differences too. The Vector class is synchronized and several legacy methods are contained in ... Read More

In this article, we will create an array of triplet and try to sort them using the Comparable and Comparator interfaces. The term array of triplet means an array having three elements. An Array is a fixed-length linear data structure that stores group of elements with similar datatypes in a sequential manner. Sort an Array of Triplet using Comparator As the name suggests, Comparator is used to compare something. In Java, the Comparator is an interface that can be passed as a parameter to sorting methods like Arrays.sort() or Collections.sort() to sort custom objects. To use it, we need to ... Read More

Vectors implement the List interface and are used to create dynamic arrays. The array whose size is not fixed and can grow as per our needs is called as a dynamic array. The Comparator is an interface available in ‘java.util’ package. Sorting means rearranging the elements of a given list or array in ascending or descending order. In this article, we will create a vector and then try to sort its elements in descending order using a comparator. Program to Sort Java Vector in Descending Order Comparator As the name suggests it is used to compare something. In ... Read More

Runtime Type Identification in short RTTI is a feature that enables retrieval of the type of an object during run time. It is very crucial for polymorphism as in this oops functionality we have to determine which method will get executed. We can also implement it for primitive datatypes like Integers, Doubles and other datatypes. In this article, we will explain the use case of Runtime Type Identification in Java with the help of examples. Program for Runtime Type Identification Let’s discuss a few methods that can help us to identify type of object: instanceOf It is a ... Read More