Java

Assignment Operators in Java: A Comprehensive Guide

Assignment operators in Java are used to assign values to variables. They combine the basic assignment operator (=) with other arithmetic or bitwise operators to perform an operation and assign the...

Java Core Java

Simple Memory Leak Example with Static List

This example demonstrates a simple memory leak in Java using a static list. Adding objects to a static list without ever removing them can lead to the list growing indefinitely, consuming more and...

Java Memory Management in Java

Encapsulation with Access Modifiers in Java

This example demonstrates encapsulation using access modifiers in Java. Encapsulation is the bundling of data (attributes) and methods that operate on that data within a class, and restricting direct...

Java Object-Oriented Programming (OOP)

Refactoring in TDD: Extract Method

This snippet demonstrates refactoring in Test-Driven Development (TDD), specifically the 'Extract Method' refactoring technique. After writing a test and implementing the functionality, you might find...

Java Testing in Java

Command Pattern Example: Remote Control

This example demonstrates the Command Pattern using a simple remote control scenario. The remote control can turn on and off a light.

Java Design Patterns in Java

Spring Boot Actuator: Exposing Health Endpoint

This code snippet demonstrates how to expose the health endpoint using Spring Boot Actuator. The health endpoint provides information about the application's health status, which is crucial for...

Java Spring Framework

NavigableMap and SortedMap Example

This code demonstrates the usage of NavigableMap and SortedMap interfaces in Java, focusing on their ability to provide sorted views and navigation capabilities within a map.

Java Java Collections Framework

Iterator Pattern Demonstration in Java

The Iterator Pattern provides a way to access the elements of an aggregate object sequentially without exposing its underlying representation. This example showcases a simple implementation of the...

Java Design Patterns in Java

Simple Maven POM File

This code snippet demonstrates a basic `pom.xml` file used in Maven projects. It includes essential information like project coordinates (groupId, artifactId, version), name, and specifies the source...

Java Java Build Tools

Java UDP Socket Example

This snippet demonstrates how to create a simple UDP socket to send and receive data between a client and a server in Java. UDP provides a connectionless, unreliable datagram service.

Java Java Networking

Simple RESTful Web Service with Spring Boot

This example demonstrates creating a simple RESTful web service using Spring Boot. It handles GET requests to retrieve a greeting and POST requests to create a new greeting.

Java Java Networking

Adding Dependencies in Maven

This snippet demonstrates how to add dependencies to your Maven project using the pom.xml file. Dependencies are external libraries or modules that your project needs to function. Managing...

Java Java Build Tools

Multi-catch Exception Handling in Java

This example demonstrates how to use multi-catch blocks in Java 7 and later to handle multiple exception types with a single catch block. This improves code readability and reduces code duplication...

Java Core Java

Creating and Using Custom Exceptions in Java

This example demonstrates how to create and use custom exceptions in Java. Custom exceptions allow you to define specific error conditions relevant to your application's domain, improving code clarity...

Java Core Java

Composite Pattern: Building Hierarchical Structures

The Composite pattern is a structural design pattern that lets you compose objects into tree structures to represent part-whole hierarchies. It allows clients to treat individual objects and...

Java Design Patterns in Java

Exposing a JPA Repository as a REST Endpoint with Spring Data REST

This snippet demonstrates how to expose a JPA repository as a REST endpoint using Spring Data REST. Spring Data REST automatically creates RESTful endpoints for your repositories, allowing you to...

Java Spring Framework

Basic Lambda Expression in Java

This snippet demonstrates the basic syntax of a lambda expression in Java, showing how to implement a functional interface.

Java Java 8 Features

Method Reference: Constructor Reference

This example showcases constructor references in Java. Constructor references are used to create new objects. It's a way to refer to a constructor without actually calling it, similar to how method...

Java Core Java

Basic For Loop Example

This snippet demonstrates the fundamental structure of a for loop in Java. It iterates a specified number of times, executing a block of code in each iteration. This is the most common and...

Java Core Java

Lambda Expressions with Built-in Functional Interfaces: Example 1 - Predicate

This snippet demonstrates how to use a lambda expression with the `Predicate` functional interface, a built-in interface in Java. `Predicate` is a functional interface that represents a boolean-valued...

Java Java 8 Features

Final Keyword: Preventing Inheritance and Modification

This snippet demonstrates the use of the final keyword in Java to prevent inheritance, method overriding, and variable modification. Understanding final is crucial for designing robust and...

Java Object-Oriented Programming (OOP)

Simulating Generational Garbage Collection

This snippet provides a rudimentary simulation of generational garbage collection, a common strategy employed by modern JVMs. It showcases how objects are classified into generations (Young...

Java Memory Management in Java

Bitwise Operators in Java: An Introduction

This snippet demonstrates the use of bitwise operators in Java. Bitwise operators perform operations on individual bits of an integer. Understanding them is crucial for low-level programming,...

Java Core Java

Creating Streams in Java 8: Stream.of() and Arrays.stream()

This example demonstrates two fundamental ways to create streams in Java 8 using the Stream.of() method for creating streams from individual elements and the Arrays.stream() method for creating...

Java Java 8 Features

Thread Lifecycle Demonstration

This example demonstrates the various stages of a Java thread's lifecycle, including NEW, RUNNABLE, BLOCKED, WAITING, TIMED_WAITING, and TERMINATED. Understanding these states is crucial for effective...

Java Concurrency and Multithreading

Facade Pattern Example: Order Processing System

This code demonstrates the Facade pattern in Java. The Facade pattern provides a simplified interface to a complex subsystem. In this example, we simulate an order processing system, where multiple...

Java Design Patterns in Java

Boolean Wrapper Class and Conditional Logic

This example demonstrates the use of the Boolean wrapper class and its interaction with conditional logic. It covers creating Boolean objects, unboxing them to primitive boolean values, and using them...

Java Core Java

Basic Gradle Build Script

This snippet demonstrates a basic Gradle build script for a simple Java project. It shows how to define project properties, dependencies, and tasks to compile and run your Java code. This is a...

Java Java Build Tools

ConcurrentLinkedQueue Example

This example demonstrates the use of ConcurrentLinkedQueue, a non-blocking, thread-safe queue. Unlike BlockingQueue, it doesn't block threads when the queue is empty or full. It is useful for...

Java Java Collections Framework

Using <code>instanceof</code> to Check Object Type

This code snippet demonstrates the use of the instanceof operator in Java to determine if an object is an instance of a particular class or interface. It showcases basic usage and inheritance...

Java Core Java