Author Archives: Stanislav_Panteleev

Role of the Class Class in Java In Java, the Class class is a part of the Reflection API and represents metadata about a class at runtime. It is located in the java.lang package and provides methods to: Obtain information … Continue reading →

In Java, an enum (short for “enumeration”) is a special data type used to define a collection of constants. Each constant in an enum is implicitly public, static, and final. Enums are commonly used when a variable can take only … Continue reading →

🔍 What is Reflection in Java? Reflection is the ability of a Java program to inspect, analyze, and even modify itself at runtime — meaning you can inspect classes, methods, fields, and constructors even if you don’t know them at … Continue reading →

Awesome question! Let’s break down the difference between Serializable and Externalizable, because they both deal with serialization — but they work very differently.

By default, Java’s built-in serialization (Serializable) works with binary streams — meaning the object is serialized into a byte stream (essentially a compact, unreadable format for humans). However, you can absolutely serialize objects into other formats like text (JSON, XML, … Continue reading →

How does Serialization work? Step 1: Implement Serializable For a class to support serialization, it must implement the java.io.Serializable interface.

The transient keyword in Java is used to indicate that a field should not be serialized when an object is converted into a byte stream (for example, when saving to a file, sending over a network, or caching).

🔹 What is Type Erasure? Type erasure is a process performed by the Java compiler when working with generics. In short: The compiler removes (erases) all generic type information during compilation, replacing it with raw types or bounds (like Object … Continue reading →

This is one of the most confusing (but important) parts of generics and wildcards in Java. Let me explain this step by step — and once you understand the logic, it will make perfect sense. 🔥

🏆 What Are Wildcards (?) in Java? Wildcards allow you to use unknown types in generics. They are useful when working with collections of different but related types. Types of Wildcards in Java Wildcard Meaning Example ? (Unbounded) Accepts any … Continue reading →