Java

The three main elements of an exception handler in Java are: try, catch and finally block. We have explored these in depth with examples and questions related to handling exceptions in Java.

Super keyword, in Java, is used to call the Constructor of the Parent Class. It is required when we need to pass some arguments to Parent Class and complete object instantiation.

in this article, we have explored the basics of Abstract Window Toolkit (AWT) in Java which is used for creating Windows based Graphical User Interface. We demonstrated it by implementing a form UI using AWT in Java.

In this article, we have focused on 2D array in Java which is a variant of the usual 1D array by introducing a new dimension. We have demonstrated different operations with 2D arrays.

An Array List is a dynamic version of array and is supported in Java's collection library. In this article, we have focused on 2D array list in Java along with different methods applicable on it like indexOf.

In this article, we have explored the different types of exceptions in Java. The main types are checked and unchecked exceptions. By definition, the types are build-in exceptions and user defined exceptions.

In this article, we have explored how to find if two strings are equal in Java. There are three ways to check if two strings in Java are equal by == operator, equals() method and compareTo() method.

Lambda expressions were added in Java 8 along with functional programming. Before understanding lambda expressions or lambdas for short, a prerequisite is to understand what is a Functional Interface.

JUnit testing is the unit testing framework for Java. We have explored JUnit testing using Maven in depth with a code example in this article.

Enum in Java is a special type of a class which can have constructors,methods, and instance variables. Enum contains a fixed set of constant. In Java, a list of predefined values can be created using enums.

In this article at OpenGenus, we are going to discuss how to create and delete folders in Java. Folders are called directories in Java and we will do this using java.io package.

In Java, inner class is a nested class which is defined within another class and it provides better encapsulation. There are several variants like anonymous inner class, method local inner class and much more.

Java handles input and output through streams and there are multiple input and output streams specialized for different use cases like BufferedOutputStream and much more which we have explored in depth in this article at OpenGenus.

In Java, we can compare String using ==, equals() and equalIgnoreCase() and each has different results. We have explained it in detail in this article.

In the context of Java Inheritance, final and abstract are two important modifiers on deciding whether a class can take part in an inheritance relationship or not.

In this article, we will work with ZIP file system in Java and see how we can move or copy files to ZIP, delete files from ZIP and rename a file in ZIP.

Method reference introduced in Java 8 release along with lambda expression as a mechanism to further shorten the lambda expressions containing a method call.

Lambda Expression is one of the newest features introduced in Java 8 release. It is an expression but in the form of an anonymous function definition.

This article brings a brief introduction to some classes available by the Date/Time Java API, with samples to the main characteristics of each one of them.

In Java, Reflection is a powerful and advanced feature that enables the programmers to inspect or modify the classes, interfaces, and methods of a program running on Java Virtual Machine.

In this article, we explore the types of references in Java which includes strong reference, weak reference, soft reference and phantom reference.

In Java, the interface is a mechanism, using which programmers can connect different software components and make them interact with each other.

In this article, we will learn to use SonarQube to analyze the code quality of existing projects and understand the different terms involved like code smell, code coverage and many others.

Java package corresponds to the file system directory managing different code levels. In this post, we have explored packages in depth.