Java Program to find Armstrong numbers with Example

Armstrong number Example in Java
How to check if a number is an Armstrong number or not? or write a Java program to find Armstrong's number? This is a common Java interview question asked on-campus interviews and fresher-level interviews. This is also a popular Java programming exercise on various schools, colleges, and computer courses to build programming logic among Students. An Armstrong number is a 3 digit number for which the sum of cube of its digits is equal to the number itself. 

Top 5 Apache Camel Online Courses for Java Developers in 2025 - Best of Lot

If you are looking to learn something new and awesome, like camel, you have come to the right place. Here, we will discuss some of the best courses available in the market currently which can really help you guys get on and learn Apache camel. Apache Camel is a black box that takes communications from one endpoint and forwards them to another. Messages may be handled or simply forwarded within the black box.

Top 5 Scala and Functional Programming Books and Courses in 2025 [Best of Lot]

Hello guys, if you are a Java developer who is interested in learning Scala or someone starting with Scala afresh and looking for some awesome Scala resources like books, courses, and tutorials then you have come to the right place. In the past, I have shared some free Scala courses and the best Scala Courses to start with and today, I will share some of the best books to learn Scala and Functional Programming, particularly Java developers. While in this age of online courses, fewer and fewer people are using books to learn a new technology or skill but in my opinion, both books and courses have different purposes. I have taken many online courses and read even more books so I can tell that books are almost always more in-depth and provide comprehensive coverage than courses.

Top 10 IDEs For Java Development In 2025 - Best of Lot

Hello guys, Are you a Java developer looking for a good IDE (Integrated Development Environment)? If so, you've come to the right place! With so many IDEs out there, it can be tough to pick the right one for you. But don't worry, I've got you covered with a list of the top 10 IDEs for Java development. For any Java developer, both beginner and experienced, choosing the right Integrated Development Environment (IDE) can make a huge difference in your productivity and overall development experience. With so many options available, it can be difficult to decide which IDE is the best fit for you but if you are in doubt, just choose the IntelliJ IDEA :-) . 

Top 10 Udemy Courses for Java Developers in 2025 - Best of Lot

Hello guys, if you are looking for best Udemy courses to learn Java and Spring Framework then you have come to the right place. Earlier, I have shred best Pluralsight courses for Java developers and best LinkedIn Courses for Java developers and today, I will share best Udemy courses for Java developers in 2025. Before we get to the important part and give you a list of the best courses that you can use to become expert Java programmers, let us start with the basics first. What is Java? In the most basic of terms, Java is a general-purpose, object-oriented, and class-based programming language that is known for having lesser implementation dependencies.

Difference between Scala, Kotlin Java Programming

Hello guys, what is difference between Java, kotlin, and Scala is a common question from Java developers and new programmers who are learning these programming language for backend development. As a Java programmer and blogger, who has also worked extensively with Kotlin, I've often been asked about the differences between these two languages and how they compare to Java. While Java remains one of the most popular programming languages in use today, both Kotlin and Scala have gained significant traction in recent years, particularly in the realm of modern web development and microservices. 

How to read CSV file in Java without using a third-party library? FileReader Example Tutorial

Hello guys, as you learn Java, one thing that comes up early and often is reading from/ writing to files, and doing something useful with that data. This is also one thing which you will keep doing and also forgetting very soon, if you are not then you have good memory as I always forget it and then I do google search to find my own articles. If you read this blog then you know that in the past, I have shared how to load CSV file using OpenCSV library as well how to load a CSV file with header using Jackson but a lot of you asked me how to do this without using any third party library like Jackson or OpenCSV. So, I thought to write about this article and I actually written but forgot to publish it for a long time. But I today I found it and publishing it now, it still works well. 

Top 10 Frequently asked SQL Query Interview Questions Answers

In this article, I am giving some examples of SQL queries which is frequently asked when you go for a programming interview, having one or two year experience in this field. Whether you go for a Java developer position, QA, BA, support professional, project manager, or any other technical position, may interviewer expects you to answer basic questions from Database and SQL. It's also obvious that if you are working for one or two years on any project there is a good chance that you come across to handle databases, writing SQL queries to insert, update, delete and select records. 

How to convert Enum to String in Java with Example

Enum to String Conversion Example in Java

There are two ways to convert an Enum to String in Java, first by using the name() method of Enum which is an implicit method and available to all Enum, and second by using toString() method. name() method of Enum returns the exact same String which is used to declare a particular Enum instance like in WeekDays Enum if we have MONDAY as one Enum instance then the name() will return String "MONDAY". This method of conversion from Enum to String is useful if the String representation of Enum is the same as its String name but if you have different String representation then you can use toString() method. 

Difference between jsp:include and jsp:forward action- Example

JSP provides standard actions to do things without using Java inside the scriptlet. Two of such standard actions, which help JSP to interact with other server resources e.g. another JSP, Servlet, or HTML files are, include and forward actions. The <jsp:forward> action enables you to forward an HTTP request to a static HTML file, a servlet, or another JSP. It has an attribute called page, which accepts the URL of another resource as shown below:

<jsp:forward page="URL" /> 

Right way to check if String is empty in Java with Example

What do most of us Java Programmers do while using String in Java? Check whether String is null or empty right? I am sure you know a couple of ways to test whether String is empty or not, but do you know the right way to do it? When we talk about Strings in Java, we can imagine them as arrays of characters, and they are, but in Java, they also object. An empty Java String is considered as the not null String that contains zero characters, meaning its length is 0. However, a Java String that might only contain the white-space character is not considered empty, it is considered to contain one character and its length is equal to 1. 

Top 10 Java Programs, Assignments, and Coding Interview Questions Answers

Java coding interview questions answers
Java coding interview questions are mostly some programming exercises which is asked to be solved in the java programming language in a limited time during any core Java or J2EE interview. No matter whether you have 2 years of experience or 4 years of experience, there is always some coding interview question in the Java programming job you are applying for. Actually, questions related to Java Coding are increasingly getting popular in Java interviews for two reasons, first its difficult to crack Java coding interview questions than answering fact-based questions like Why String is immutable in Java or Why main is static in Java etc.

What is Method Overloading in Java? An Example

What is method overloading in Java?
Method overloading in Java is an object-oriented programming concept that allows a programmer to declare two methods of the same name but with different method signatures, like a change in the argument list or a change in the type of argument. Method overloading is a powerful Java programming technique to declare a method that does a similar job but with a different kind of input. One of the most popular examples of method overloading is the System.out.println() method whose job is to print data on the console. This method is overloaded to accept all kinds of data types in Java. 

What is Method Overriding in Java ? Example Tutorial

Method overriding in Java

Method overriding in Java is a concept based on polymorphism OOP concept allows the programmer to create two methods with the same name and method signature on the interface and its various implementation and the actual method is called at runtime depending upon the type of object at runtime. Method overriding allows you to write flexible and extensible code in Java because you can introduce new functionality with minimal code change. Method overriding is different than the method overloading in Java which we have discussed in the last article.

Top 10 Tricky Java interview questions and Answers

What is a tricky question? Well, tricky Java interview questions are those questions that have some surprise element on them. If you try to answer a tricky question with common sense, you will most likely fail because they require some specific knowledge. Most of the tricky Java questions come from confusing concepts like method overloading and overriding, Multi-threading which is really tricky to master character encoding, checked vs unchecked exceptions, and subtle Java programming details like Integer overflow. The most important thing to answer a tricky Java question is attitude and analytical thinking, which helps even if you don't know the answer. 

How to Read, Write XLSX File in Java - Apache POI Example

No matter how Microsoft is doing in comparison with Google, Microsoft Office is still the most used application in software world. Other alternatives like OpenOffice and LiberOffice have failed to take off to challenge MS Office. What this mean to a Java application developer? Because of huge popularity of MS office products you often need to support Microsoft office format such as word, Excel, PowerPoint and additionally Adobe PDF. If you are using JSP Servlet, display tag library automatically provides Excel, Word and PDF support. Since JDK doesn't provide direct API to read and write Microsoft Excel and Word document, you have to rely on third party library to do your job. Fortunately there are couple of open source library exists to read and write Microsoft Office XLS and XLSX file format, Apache POI is the best one. It is widely used, has strong community support and it is feature rich.

What is Event Sourcing Design Pattern in Java Microservices? Example

Hello Java programmers, if you are tired of constantly trying to keep track of your application's current state using a traditional relational database then the Event Sourcing pattern might be just what you need. Event Sourcing is a popular pattern in Microservice architecture that allows services to persist and query the state of an application using a sequence of events instead of storing the current state. This pattern has gained popularity because it helps to build complex systems with a clear audit trail and support for long-term scalability. By storing a sequence of events, rather than just the latest state, developers can reconstruct the application state at any point in time, even after failures or bugs. It's also one of the 10 essential Microservice patterns I have shared earlier and it's one of the top 3 along with Saga and CQRS patterns which we have seen in my earlier articles.  

10 Examples of print(), println() and prinf() methods In Java - PrintStream

Hello guys, if you are working in Java or just started with Java then you have must come across statements like System.out.println("Hello world") to print something on console or command prompt. This is actually the first statement I wrote in Java when I started programming and at that time I didn't realize how it work and what is System and PrintStream class and what is out here but now I know and I am going to explain all this to you in this article, along with PrintStream class and its various print methods like print(), println() and particularly printf() to print various objects in Java. But,   Before we get to the 10 examples of Printstream printf() in Java, let me tell you a little bit more about what exactly Printstream is. 

Top 50 Advanced Java Garbage Collection and Performance Interview Questions and Answers

Hello Java Developers, If you have gone through any Java Developer interview, particularly for a senior developer role then you know that a good knowledge of JVM internals and Garbage collection is important. Even though Java and JVM take care of memory management for you, bad code can still cause memory leaks and performance issues. For example, if you are creating millions of objects in a loop or keeping an un-intended reference of dead objects then you are putting additional strain on the Garbage collector and creating a memory leak in your application. You cannot blame Java and JVM for that and the only way to avoid such errors is to know about how Garbage collection works.

5 Advanced Books for Experienced Java, C++, Python, Ruby and JavaScript Developers

It's one thing to know about the syntax and semantics of a programming language and other things to use it effectively. If you are a programmer and want to take your programming skill to next level in your choice of programming language, and looking for the best resources then you have come to the right place. Earlier, I have shared the best online courses to learn Python, Java, JavaScript, and C++, and today, I am going to share advanced programming books for experienced Java, C++, Python, Ruby, and JavaScript developers. To be honest, there are several books that will be taught you about the syntax and grammar of a programming language, but there are really few books that will teach you the customary and effective ways to use it, also known as idiom and usages.