The java programs start execution when JVM calls the main() method. Java application begin from this method. Without main method, a java file will compile successfully because at compile time, compiler doesn’t check for main method but at run time JVM checks whether the main() method is available or not. ... Read More

Java provides different ways to add characters to a string. We can add characters in the beginning or at the end or at any position according to the need. In this article we are going to see three approaches to do so − Using ‘+’ operator Using methods of ... Read More

One of the most interesting interview questions that I have encountered in my Java programming career is about the hashCode and equals methods. Interviewers always check whether the candidate knows equals() and hasCode() methods as they are the most important yet most confusing methods of the Java Object class. Both ... Read More

Java is a widely used programming language available nowadays. It serves to develop a variety of software including web and mobile applications. It is also preferable when it comes to developing a backend system. Java has made tremendous progress over the year that has changed the world. This is the ... Read More

We can find many similarities between Java and C/C++ programming languages in terms of syntaxes and features. But, there are several functionalities that have been omitted from Java like 'typedef'. If someone coming from a C/C++ background, must have heard the 'typedef' keyword, and often wonders, is there any equivalent ... Read More

Being a programmer we must have developed an application that performs CRUD operations. Here, the term CRUD means Create, Read, Update and delete. The collection on which these operations can be performed is called as modifiable collection. However, there is a way to make a collection unmodifiable so that one ... Read More

In simple words, the iterable interface is a common interface that allows us to iterate over a collection of objects. It was first introduced with the release of JDK 1.5 and made available in 'java.lang' package. The Java Collection Framework extends this interface, hence all the classes available in this ... Read More

In Java, interfaces serve two purposes pure abstraction and multiple inheritance. Generally, an interface consists of abstract methods and variables that define the behavior which a class can implement. If we create two interfaces that contain methods and variables with the same name, then interface naming conflicts may arise. However, ... Read More

Array is a linear data structure that is used to store a group of elements with similar datatypes. It stores data in a sequential manner. Once we create an array we can't change its size i.e. it is of fixed length. There are various ways to create an array named ... Read More

In Java, the streams allow us to perform the functional operations on the specified element. It simply channelizes the elements of source such as arrays, files and classes of collection framework, through various built-in methods to return the result. These built-in methods could be intermediate or terminal. In this article, ... Read More