Java Advanced Archives

Java Collections Framework: A Complete Guide

The Java Collections Framework (JCF) is one of the most powerful and widely used features of Java, providing a unified architecture for storing, manipulating, and processing groups of objects. It is one of…

Jewel Chowdhury March 2, 2025

jsp Java Java Advanced

[solved] hibernate.cfg.xml location in maven project

Hello guys, In this article, I will describe where you will keep the hibernate.cfg.xml file in your project directory. It’s a common error while working on maven based hibernate project.…

Jewel Chowdhury May 29, 2022

Java Java Advanced

How can I solve “java.lang.NoClassDefFoundError”

Hello guys, today we will show a common error while working on java based projects. This error is “java.lang.NoClassDefFoundError“. We will see how to solve this. Exception in thread "main"…

Jewel Chowdhury May 29, 2022

Java Java Advanced jsp

web.xml File Location in Dynamic WebApp in Eclipse IDE

Hello friends, Sometimes when we are working with webapp in Eclipse, may not create the web.xml file by default. As a result, we have to create the web.xml file manually.…

Jewel Chowdhury May 26, 2022

Java Java Advanced jsp

How to Handle Error in Web.xml for Java Web Applications

Hello friends, Today I will show you how to handle the error or display customized error messages in JSP and servlet. This example will display the personalized error messages on…

Jewel Chowdhury May 26, 2022

Java Java Advanced jsp

How to send redirect from Java Servlet

Hello friends, Today I am going to show you how to send redirect from Java Servlet. In this example, we will use how to send redirects from Java Servlet. At…

Jewel Chowdhury May 24, 2022

Java Java Advanced jsp

How to display a list of objects in JSP through Servlet

Hello friends, Today I am going to show you how to display a list of objects using JSP and servlet. In this example, we will display a list of object…

Jewel Chowdhury May 22, 2022

Java Java Advanced jsp

How to show data from MySQL database using JSP and Servlet

Hello friends, Today I am going to show you how to display data from the MySQL database using JSP and servlet. In this example, we will display data from the…

Jewel Chowdhury May 22, 2022

jsp Java Java Advanced

How to insert data in MySQL database using JSP and Servlet

Hello friends, Today I am going to show you how to insert data in the MySQL database using JSP and servlet. In this example, we will insert data in the…

Jewel Chowdhury May 22, 2022

Java Java Advanced

How to Build a Web Scraper in Java

Hello, Today we are going to build a web scraper. Although All of you know the term, I just want to tell you shortly what exactly web scraper is? Web…

Jewel Chowdhury February 24, 2022

Interview Questions Java Java Advanced

Java pass by reference

Is java pass by reference? The answer is NO. Java is always pass-by-value. Today we will learn java pass by reference and java pass by value with examples. Let’s create Person class: package com.example; public…

Jewel Chowdhury July 6, 2021

Java Advanced Java

Java null pointer exception

Today we will learn, What is a NullPointerException, and how do I fix it? So, let’s start: What is NullPointException NullPointException is a RunTimeException. NullPointException is thrown when the value…

Jewel Chowdhury July 6, 2021

Java Advanced Uncategorized

What is a serialVersionUID and why should I use it?

Serialization Serialization allows to convert an object to a stream, for sending that object over the network OR Save to file OR save into DB for letter usage. serialVersionUID It is…

Jewel Chowdhury June 14, 2021

Java Java Advanced

How to handle null pointer exception in Java

NullPointException NullPointException is a RunTimeException. NullPointException is thrown when the value of a reference variable or object is null. How to avoid NullPointException? Before using any object or reference variable,…

Jewel Chowdhury February 7, 2021

Java Java Advanced

How to handle IOException in Java

IOException In Java, IOException is one of the most common Exceptions when the program operates between input and output.IOException is used for input and output-related operations. Sometimes it’s called Input-Output Exception. Whatever the reason…

Jewel Chowdhury February 7, 2021

Java Java Advanced

Exception handling in java with examples

Exception Handling in Java is a powerful mechanism. Exception handling is done to handle the run time error of the program and to maintain normal flow. The exception refers to an abnormal…

Jewel Chowdhury February 7, 2021

Java Java Advanced

Getters and Setters in Java

Hello guys! In this tutorial, we have figure out the getters and setters method and their features in Java. We will learn accessor and mutator in the Java programming language.…

Jewel Chowdhury January 20, 2021