Category Archive for "Java"

How to use java.net.URLConnection to fire and handle HTTP requests

The java.net.URLConnection class in Java is used to establish a connection to a URL and perform various operations such as sending HTTP requests, receiving HTTP respo...

Iterating through a Collection without ConcurrentModificationException

: When working with collections in Java, it is common to iterate through the elements of a collection and perform some operations on them. However, there is a common i...

Why use getters and setters/accessors?

When developing object-oriented programs, it is a common practice to use getters and setters, also known as accessors and mutators, to access and modify the values of class fields...

Understanding Java Access Modifiers: public, protected, package-private, and private

to Access Modifiers in Java Access modifiers in Java are keywords used to set the accessibility of classes, interfaces, methods, and variables within a program. These...

Solving the Non-static Variable Cannot be Referenced from a Static Context Error in Java

When working with Java, you may encounter an error message that says "non-static variable cannot be referenced from a static context". This error occurs when you are...

How to sort a Map by values in Java

In Java, sorting a Map by its values is not as straightforward as sorting a List. However, there are several approaches you can take to solve this problem. In this article, we will...

Understanding Integer Division in Java

Have you ever encountered a situation where the result of an integer division in Java doesn't match your expectations? Specifically, have you noticed that when you divide...

How to Create a Generic Array in Java

Java generics provide a way to create reusable, type-safe code. However, due to the limitations of the Java language, it is not possible to directly create a generic array in Java....

How do servlets work? Instantiation, sessions, shared variables and multithreading

Servlets are server-side Java components that are used to create dynamic web applications. They work by intercepting and processing client requests and generating res...

String.equals versus == in Java

This article discusses the difference between using the String.equals() method and the "==" operator in Java when comparing strings. We will explore the reasons why the given code...