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BufferedReader vs Console vs Scanner in Java 1. Overview In this article, we’re going to walk through the differences between BufferedReader, Console, and Scanner classes in Java. To have a deep dive on each topic, we suggest having a look at our individual articles on Java Scanner, Console I/O in Java,… Continue Reading bufferedreader-vs-console-vs-scanner-in-java

Java @Deprecated Annotation 1. Overview In this quick tutorial, we’ll have a look at deprecated APIs in Java and how to use the @Deprecated annotation. 2. The @Deprecated Annotation As a project evolves, its API changes. Over time, there are certain constructors, fields, types or methods that we don’t want people… Continue Reading java-deprecated

Java @Override Annotation 1. Overview In this quick tutorial, we’ll have a look at how to use the @Override annotation. 2. @Override Annotation In a subclass, we can override or overload instance methods. Overriding indicates that the subclass is replacing inherited behavior. Overloading is when a subclass is adding new… Continue Reading java-override

Stack Memory and Heap Space in Java 1. Introduction To run an application in an optimal way, JVM divides memory into stack and heap memory. Whenever we declare new variables and objects, call new method, declare a String or perform similar operations, JVM designates memory to these operations from either… Continue Reading java-stack-heap

Retrieve Fields from a Java Class Using Reflection 1. Overview Reflection is the ability for computer software to inspect its structure at runtime. In Java, we achieve this by using the Java Reflection API. It allows us to inspect the elements of a class such as fields, methods or even… Continue Reading java-reflection-class-fields

Abstract Classes in Java 1. Overview There are many cases when implementing a contract where we want to postpone some parts of the implementation to be completed later. We can easily accomplish this in Java through abstract classes. In this tutorial, we’ll learn the basics of abstract classes in Java,… Continue Reading java-abstract-class

Type Erasure in Java Explained 1. Overview In this quick article, we’ll discuss the basics of an important mechanism in Java’s generics known as type erasure. 2. What Is Type Erasure? Type erasure can be explained as the process of enforcing type constraints only at compile time and discarding the… Continue Reading java-type-erasure

Inheritance and Composition (Is-a vs Has-a relationship) in Java 1. Overview Inheritance and composition — along with abstraction, encapsulation, and polymorphism — are cornerstones of object-oriented programming (OOP). In this tutorial, we’ll cover the basics of inheritance and composition, and we’ll focus strongly on spotting the differences between the two… Continue Reading java-inheritance-composition

Method References in Java 1. Overview One of the most welcome changes in Java 8 was the introduction of lambda expressions, as these allow us to forego anonymous classes, greatly reducing boilerplate code and improving readability. Method references are a special type of lambda expressions. They’re often used to create simple… Continue Reading java-method-references