Core Java APIs and programming techniques
Technologies related to Java APIs (application programming interfaces) and JDK (Java Development Kit) form the cornerstone of modern, enterprise-grade software development. Here we explore all the Java features that make the JVM great through programming tutorials, real-world code samples and expert opinions from Java champions.
Top Stories
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Tip
26 Aug 2025
Developers and vibe coding: 4 survival tips in the AI age
Programmers can stay a step ahead of AI agents and vibe coding by focusing on four areas: precise AI prompts, a broad architectural perspective, keen analysis and imagination. Continue Reading
By- Bob Reselman, CogArtTech
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Tutorial
22 Aug 2025
Vibe coding tutorial with Replit and GitHub Copilot
Vibe coding, or using AI agents to create application code, is all the rage today. This video tutorial shows how it works using popular AI tools Replit and GitHub Copilot. Continue Reading
By- Bob Reselman, CogArtTech
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Blog Post
07 Oct 2024
Database transaction isolation levels tutorial
Repeatable? Isolated? Serializable? Uncommitted? None? Just how well do you know your database isolation levels, and how do you know if you're using the right one? Here's how you know. Continue Reading
By- Cameron McKenzie, TechTarget
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Tip
04 Oct 2024
How to solve the pinning problem in Java virtual threads
Virtual threads in Java offer many benefits, but they're not a drop-in replacement for traditional threads. Understand and plan around their limitations, most notably pinning. Continue Reading
By- A N M Bazlur Rahman, DNAStack
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Tip
04 Oct 2024
The interface segregation principle: A fun and simple guide
Want a fun way to learn the interface segregation principle of SOLID object-oriented design? Imagine a remote control that tries to do everything but just mucks it all up. Continue Reading
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Tip
03 Oct 2024
Simplifying native interoperability in Java with JEP 454
Finalized in Java 22, JEP 454 helps developers safely and efficiently call native functions and manage memory outside of Java. Here's a rundown of how it works. Continue Reading
By- A N M Bazlur Rahman, DNAStack
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Tip
03 Oct 2024
What's wrong with Java? Nothing, but evaluate alternatives
Java's benefits don't always fit a given task, and a different language might be a better choice. Use these comparisons to choose the best code for your needs. Continue Reading
By- Walker Aldridge, Lairds Computer Services
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Tip
02 Oct 2024
An introduction to TypeSpec, a new API definition language
Standardizing API descriptions and converting API definitions into different formats can be challenging. TypeSpec, a new API definition language, aims to solve that. Continue Reading
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Blog Post
30 Sep 2024
Profiles, Spring Boot and application properties files
Spring profiles are a powerful and flexible tool for Java developers to build scalable, enterprise-grade applications, from customizing configurations to altering IoC behavior across environments. Continue Reading
By- Cameron McKenzie, TechTarget
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Tutorial
24 Sep 2024
OpenAI API tutorial: How to use AI prompt chaining
This walkthrough teaches developers how to chain AI prompts and models using the OpenAI API, in this case to identify and present specific data from William Shakespeare plays. Continue Reading
By- Bob Reselman, CogArtTech
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Video
04 Sep 2024
Model-view-controller design pattern tutorial
How well do you know the MVC design pattern? The basic concept is simple, but the details trip up many developers. This deep dive explores what MVC is and how to best implement it. Continue Reading
By- Cameron McKenzie, TechTarget
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Video
19 Aug 2024
Spring Web MVC crash course
There's still a place in the world for server-side rendering. Learn the Java way to build HTTP responses on the server with this Spring MVC crash course for beginners. Continue Reading
By- Cameron McKenzie, TechTarget
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Video
16 Aug 2024
How to deploy Spring Boot apps in AWS
You don't need a Kubernetes cluster to host your cloud-native Spring Boot microservices. Learn how to quickly deploy your Spring Boot applications in AWS using ECS and Fargate. Continue Reading
By- Cameron McKenzie, TechTarget
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Definition
14 Aug 2024
What is an API (application programming interface)?
An application programming interface (API) is code that enables two software programs to communicate. Continue Reading
By- Alexander S. Gillis, Technical Writer and Editor
- Ben Lutkevich, Site Editor
- Tom Nolle, Andover Intel
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Video
13 Aug 2024
Standalone Spring Boot console apps with CommandLineRunner
Want to create a Spring Boot application that runs at the command line? It's easy. Simply implement the CommandLineRunner interface, and override the required run method. Here's how. Continue Reading
By- Cameron McKenzie, TechTarget
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Video
06 Aug 2024
OpenAPI, Swagger and Spring Boot REST APIs
It's easy to integrate Swagger into your Spring Boot apps with SpringDoc's OpenAPI starter. Code generation, documenting REST APIs and testing endpoints has never been easier. Continue Reading
By- Cameron McKenzie, TechTarget
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Blog Post
04 Aug 2024
Best crash course to learn Jenkins from scratch
Need to learn Jenkins CI fast? This Jenkins tutorial will quickly get you up to speed on how to use the popular CI/CD tool. Continue Reading
By- Cameron McKenzie, TechTarget
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Video
29 Jul 2024
Java tic-tac-toe game coding tutorial
What's the best way to learn how to program? Code up some of your favorite childhood games. Here, we'll show you how to code a tic-tac-toe game in Java. Continue Reading
By- Cameron McKenzie, TechTarget
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Tutorial
29 Jul 2024
Natural language programming using GPTScript
GPTScript enables programmers to use natural language syntax and tap into OpenAI when building apps. Here's a basic GPTScript tutorial with examples for beginners. Continue Reading
By- Bob Reselman, CogArtTech
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Definition
26 Jul 2024
What is a bitwise operator?
A bitwise operator is a character that represents an action taken on data at the bit level, as opposed to bytes or larger units of data. Continue Reading
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Video
19 Jul 2024
GET vs. POST: What's the difference?
POST and GET are the two most-used RESTful HTTP methods. But how well versed are you on the differences between them? Continue Reading
By- Cameron McKenzie, TechTarget
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Video
18 Jul 2024
How to apply the Liskov substitution principle in Java
The Liskov substitution principle is often mistaken for polymorphism and inheritance. To really understand the SOLID LSP, you must understand the nuance and distinction. Continue Reading
By- Ashik Patel, Xennial Innovations Inc.
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Video
17 Jul 2024
How to install MySQL on Windows
Need a well-maintained, open-source, standards-based database to test your Java apps and Spring Boot microservices? Here's how to download and install the MySQL Community Edition. Continue Reading
By- Cameron McKenzie, TechTarget
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Tutorial
12 Jul 2024
Using generics in Typescript: An in-depth tutorial
Generic variables give the TypeScript language versatility and compile-time type safety that put it on par with Java, C# and C++. These examples show how to use TypeScript generics. Continue Reading
By- Bob Reselman, CogArtTech
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Video
09 Jul 2024
Python's GIL removal is a poison pill and benefits Mojo
Developers have pleaded for 30 years for the stewards of the language to remove Python's GIL. If they do it now, it will be the end of Python. Continue Reading
By- Darcy DeClute, Scrumtuous Inc.
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Tip
03 Jul 2024
Top benefits of the Zig programming language
Does the world really need another programming language? Yes, say developers behind Zig. Here are five of the top features Zig brings to the programming world. Continue Reading
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Tip
03 Jul 2024
How to use parallel streams in Java with virtual threads
Virtual threads in Java currently lack integration with the stream API, particularly for parallel streams. Here's how a JDK 22 preview feature addresses the problem. Continue Reading
By- A N M Bazlur Rahman, DNAStack
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Video
20 Jun 2024
No-GIL Python is a mistake
Python's GIL is slated for the chopping block, and while the promise is improved performance, the reality of removing the GIL may be quite different. Continue Reading
By- Darcy DeClute, Scrumtuous Inc.
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Tip
14 Jun 2024
ORM vs. SQL: When to use each
Object relational mapping and raw SQL are two different ways to interact with relational databases. Learn when to use each of the two methods and when using both is appropriate. Continue Reading
By- Matt Heusser, Excelon Development
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Tip
10 Jun 2024
5 Java ORM tools to know
ORMs are a popular method for connecting to databases from Java. Consider the tradeoffs of these ORM tools to decide which tool to run with. Continue Reading
By- Matt Heusser, Excelon Development
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Tip
05 Jun 2024
Advanced Java pattern matching techniques, with examples
Dive deeper into Java pattern matching techniques with these examples that range from nested records to type inference, variables and generics. Continue Reading
By- A N M Bazlur Rahman, DNAStack
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Video
30 May 2024
Constructor overloading in Java
Not every language supports method overloading, but Java always has. Here's how to perform constructor overloading in Java. Continue Reading
By- Cameron McKenzie, TechTarget
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Tip
28 May 2024
4 distributed ledger technology risks and how to solve them
Ready to use distributed ledger technologies for smart contracts or other transactions? Know what risks to avoid and overcome to maximize these platforms for your organization. Continue Reading
By- Bob Reselman, CogArtTech
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Tip
23 May 2024
Introduction to pattern matching in Java
Pattern matching in Java helps developers better describe data structures and avoid runtime errors, while making code more readable and easier to maintain. Here's how it works. Continue Reading
By- A N M Bazlur Rahman, DNAStack
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Tip
10 May 2024
An introduction to the RESTful API Modeling Language (RAML)
The RESTful API Modeling Language, or RAML, can be a powerful tool for developers looking to create an efficient, standardized API management strategy. Continue Reading
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Video
10 May 2024
Java records tutorial
Java is constantly evolving, but some changes are more significant than others. This Java records tutorial teaches you about this decade's largest language enhancement to date. Continue Reading
By- Cameron McKenzie, TechTarget
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Video
01 May 2024
Java's default constructor tutorial
They say you don't get anything for free, but in the world of software development, Java developers can use the default constructor without paying any price. Continue Reading
By- Cameron McKenzie, TechTarget
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Tip
01 May 2024
Use sealed classes in Java to control your inheritance
Need to limit the number of possible subclasses in your codebase? Here comes Java's sealed classes to your rescue. Continue Reading
By- A N M Bazlur Rahman, DNAStack
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Tip
29 Apr 2024
Know how and when to use blockchain vs. distributed ledgers
Blockchain and distributed ledgers are similar but not quite synonymous. Learn their differences and how they are used, including together, for transactions and data storage. Continue Reading
By- Bob Reselman, CogArtTech
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Tip
11 Apr 2024
Speed up Python and NumPy by avoiding the conversion tax
Data and memory transfers in Python come with a hidden performance tax. Here's how to use NumPy for optimal performance by avoiding jumps across a hidden line of conversions. Continue Reading
By- Maxim Zaks, Yoyo Labs
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Tip
09 Apr 2024
5 code refactoring patterns, with examples
First-time finished code is rarely elegant or maintainable. Refactoring helps keep a growing codebase maintainable and extendable over time -- as long as you know where to stop. Continue Reading
By- Walker Aldridge, Lairds Computer Services
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Video
09 Apr 2024
Top REST API URL naming convention standards
There is no official REST URL naming standard. However, these 15 RESTful API naming conventions will help you create highly interoperable web services. Continue Reading
By- Raghu Karan Adapala, Xennial Innovations Inc.
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Blog Post
08 Apr 2024
Worlds toughest core Java interview question
The trickiest Java interview question ever asked? In five words or less, explain the red 'x' the Eclipse IDE displays at the end of the provided Java code snippet. Continue Reading
By- Darcy DeClute, Scrumtuous Inc.
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Video
04 Apr 2024
10 constructor types in Java
How many different types of Java constructors could you name? The Java spec names 10. Generic, canonical and anonymous Java constructor types just might be new to you. Continue Reading
By- Cameron McKenzie, TechTarget
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Video
04 Apr 2024
How Java 17 records work
Devs aren't using Java 17 records nearly enough. With the power to clean up your code and make your apps faster, Java records should be the norm and not the exception. Continue Reading
By- A N M Bazlur Rahman, DNAStack
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Video
01 Apr 2024
How to use Git's 'set upstream push' command
Need to fix the 'no upstream branch' error message? Then you need to run the 'git set upstream push' command. Here's how. Continue Reading
By- Cameron McKenzie, TechTarget
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Tutorial
27 Mar 2024
How the saga design pattern in microservices works
When a sequence of steps must be performed to support an operation, the microservices saga design pattern is a perfect fit. Continue Reading
By- Bob Reselman, CogArtTech
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Definition
25 Mar 2024
Spring Framework (Spring)
The Spring Framework (Spring) is an open source software development framework that provides infrastructure support for building Java-based applications on any deployment platform. Continue Reading
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Video
19 Mar 2024
Learn Maven tutorial for beginners
Apache Maven is the Java world's most popular build tool, and if you're a Java developer, it behooves you to learn it. This Maven tutorial will make you an expert in a hurry. Continue Reading
By- Cameron McKenzie, TechTarget
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Video
12 Mar 2024
Full Java constructors tutorial
How well do you know how Java constructors work? This quick Java constructors tutorial teaches you about defaults, overloading, initializing and parameterizing constructors in Java. Continue Reading
By- Cameron McKenzie, TechTarget
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Definition
05 Mar 2024
EAI (enterprise application integration)
Enterprise application integration (EAI) is the process of connecting an organization's business applications, services, databases and other systems into an integrating framework that facilitates communications and interoperability. Continue Reading
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Video
22 Feb 2024
Why we use static final in Java for constants
Java doesn't have global constants per se, but it does have static final variables. Here we explore how these two keywords make a variable constant in Java. Continue Reading
By- Cameron McKenzie, TechTarget
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Definition
15 Feb 2024
event handler
In programming, an event handler is a callback routine that operates asynchronously once an event takes place. Continue Reading
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Blog Post
14 Feb 2024
String to long in Java
The correct way to convert a String to long in Java is with the parseLong method of the wrapper class. The constructor conversion approach is deprecated! Use parseLong instead. Continue Reading
By- Cameron McKenzie, TechTarget
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Blog Post
02 Feb 2024
How to unstage a file in Git
Want to unstage a file in Git? Use the restore command. Other options to have Git remove a file from the staging index have unintended consequences you'd really rather avoid. Continue Reading
By- Cameron McKenzie, TechTarget
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Tip
30 Jan 2024
2024 technology predictions around AI, Mojo and blockchain
Blockchain, AI, anti-competitive activity and the new programming language Mojo are sure to fill the headlines in 2024. Continue Reading
By- Bob Reselman, CogArtTech
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Tip
23 Jan 2024
Debunking 5 blockchain myths and misconceptions
There's more to blockchain development than what you hear from the crypto community. Here, we debunk five common blockchain myths. Continue Reading
By- Bob Reselman, CogArtTech
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Blog Post
18 Jan 2024
Finding duplicate entries in a list in Python
A common problem in computing is to find out if a list contains duplicate entries. It's also a good subject to explore various ways to solve a problem. In this case, we will see the performance ... Continue Reading
By- Walker Aldridge, Lairds Computer Services
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Blog Post
09 Jan 2024
Install the Eclipse IDE on Windows video tutorial
Need to install the Eclipse IDE on Windows? This quick video tutorial shows you how to install Eclipse and build your very first Java application in the popular, open-source IDE. Continue Reading
By- Cameron McKenzie, TechTarget
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Blog Post
09 Jan 2024
Find duplicates in a List in Java
Need to dedupe a Java list? Here are 5 simple ways to remove duplicates from a List in Java. Continue Reading
By- Walker Aldridge, Lairds Computer Services
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Blog Post
08 Jan 2024
The prefix sum array problem
The prefix sum problem is often used to test a developer's mettle. Here's a simple solution to the prefix sum problem in Java that uses loops, arrays and basic Java syntax. Continue Reading
By- Cameron McKenzie, TechTarget
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Tip
04 Jan 2024
How the event sourcing design pattern works, with example
Learn how to control state changes as immutable events through the event sourcing model. Continue Reading
By- Bob Reselman, CogArtTech
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Tip
28 Dec 2023
The benefits of using compiled regex in Python and Java
Whether you're programming in Java or Python, compiled regex can significantly speed up your text manipulation routines. Continue Reading
By- Walker Aldridge, Lairds Computer Services
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Tip
27 Dec 2023
Shorter code, fewer bugs: Python's syntax is its saving grace
Is shorter code too dense and hard to parse, or is it inherently more efficient and secure? Here's why Python's compact syntax tends toward less buggy code. Continue Reading
By- Walker Aldridge, Lairds Computer Services
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Blog Post
27 Dec 2023
Remove duplicates from a Java List
Deduping is a common part of data cleansing. Here are four simple ways to remove duplicates from lists in Java. Continue Reading
By- Walker Aldridge, Lairds Computer Services
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Feature
19 Dec 2023
The 5 SOLID principles of object-oriented design explained
In this primer on SOLID, we'll examine the five principles this development ideology embodies, the practices they encourage and the reasons these concepts matter. Continue Reading
By- Fred Churchville, TechTarget
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Blog Post
06 Dec 2023
How the Actor Model works by example
For enterprise systems that need a flexible, asynchronous and message driven architecture, the Actor Model is often the right fit. Continue Reading
By- Bob Reselman, CogArtTech
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Tip
05 Dec 2023
A primer on Java 21 virtual threads with examples
Virtual threads let developers build applications that handle potentially millions of users and ensure consistent service delivery. Here's how Java 21 virtual threads work. Continue Reading
By- Bob Reselman, CogArtTech
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Answer
01 Dec 2023
11 real benefits of microservices
There's a reason why so many vendors have moved from monoliths to microservices. Here are 11 real benefits microservices bring to companies. Continue Reading
By- Cameron McKenzie, TechTarget
- Bob Reselman, CogArtTech
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Answer
16 Nov 2023
10 disadvantages of microservices you'll need to overcome
Not everyone is keen to adopt a cloud-native architecture, for good reasons. These common drawbacks to microservices might convince you to stick with your traditional architecture. Continue Reading
By- Bob Reselman, CogArtTech
- Cameron McKenzie, TechTarget
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Tip
19 Oct 2023
Understanding protocol buffers vs. JSON
Protocol buffers have some compelling advantages over JSON when it comes to sending data between internal services. But is it really a replacement for JSON? Continue Reading
By- Twain Taylor, Twain Taylor Consulting
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Tip
04 Oct 2023
9 tips to improve Python performance
Python performance gets a bad rap compared with languages such as Java. Use these tips to identify and fix problems in your Python code to tweak its performance. Continue Reading
By- Alfred "Fred" Christianson, Developer Relief LLC
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Blog Post
18 Sep 2023
Java vs. Python: Application code comparison
When you compare Java vs. Python application development in terms of simplicity, conciseness, security and performance, Java comes out on top in every category. Continue Reading
By- Darcy DeClute, Scrumtuous Inc.
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Definition
12 Sep 2023
model-view-controller (MVC)
In programming, model-view-controller (MVC) is an architectural design pattern that organizes an application's logic into distinct layers, each of which carries out a specific set of tasks. Continue Reading
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Blog Post
30 Aug 2023
10 reasons to use Kotlin
Curious about the Kotlin language? It's an excellent choice as either a companion or alternative to Java, and offers many capabilities Java programmers wish they had all along. Continue Reading
By- Joseph B. Ottinger, EnigmaStation
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Definition
30 Aug 2023
thread
A thread is, fundamentally, a clear, well-defined theme, subject, topic or focus. Continue Reading
By- Stephen J. Bigelow, Senior Technology Editor
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Tutorial
11 Aug 2023
Understanding TypeScript generics
Programming languages such as Java, C# and Swift use generics to create code that's reusable and enforce type safety. In this tutorial, learn how generics in TypeScript work. Continue Reading
By- Bob Reselman, CogArtTech
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Tip
21 Jul 2023
The dangers of Python import and how enterprises can be safe
The Python import statement carries a security risk that developers and enterprises need to watch out for. Here's how it works and why there's no easy fix. Continue Reading
By- Walker Aldridge, Lairds Computer Services
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Definition
13 Jul 2023
Remote Method Invocation (RMI)
Remote Method Invocation (RMI) is an application programming interface (API) in the Java programming language and development environment. Continue Reading
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Tutorial
12 Jul 2023
Understanding the TypeScript method decorator
This tutorial explores TypeScript method decorators, reusable code similar to Java annotations that lets developers apply logic in a declarative manner at design time. Continue Reading
By- Bob Reselman, CogArtTech
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Definition
10 Jul 2023
Java Mission Control
Java Mission Control is a performance-analysis tool that renders sampled JVM metrics in easy-to-understand graphs, tables, histograms, lists and charts. Continue Reading
By- Cameron McKenzie, TechTarget
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Definition
10 Jul 2023
snake case
Snake case is a naming convention where a developer replaces spaces between words with an underscore. Continue Reading
By- Cameron McKenzie, TechTarget
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Tip
30 Jun 2023
How to apply the open-closed principle in Java
How does the open-closed SOLID principle work in a Java program? Here we show you what this important principle means, and how to implement the open-closed principle in Java. Continue Reading
By- Ashik Patel, Xennial Innovations Inc.
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Definition
27 Jun 2023
pseudocode
Pseudocode is a detailed yet readable description of what a computer program or algorithm should do. Continue Reading
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Quiz
20 Jun 2023
10 WebAssembly questions to test your Wasm knowledge
Test your knowledge of WebAssembly with this tough, ten-question quiz on the benefits and applications of the new Wasm standard. Continue Reading
By- James Montgomery, Senior Features Editor
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Definition
19 Jun 2023
requirements analysis (requirements engineering)
Requirements analysis (requirements engineering) is the process of determining user expectations for a new or modified product. Continue Reading
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Definition
12 Jun 2023
lambda
Lambda, the 11th letter of the Greek alphabet, is used as both a symbol and a concept in various fields of science, mathematics and computing. Continue Reading
By- Nick Barney, Technology Writer
- TechTarget Contributor
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Definition
31 May 2023
tuple
A tuple, pronounced TUH-pul, is an ordered and finite list of elements in various fields of interest, including computing. Continue Reading
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Definition
22 May 2023
API security
Application program interface (API) security refers to policies and procedures that protect APIs against malicious attacks and vulnerabilities. Continue Reading
By- Kinza Yasar, Technical Writer
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Definition
19 May 2023
no op (no operation)
No op means 'no operation,' which is a computer instruction that specifies no operation but takes up a small amount of storage space. Continue Reading
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Definition
16 May 2023
Unicode
Unicode is a universal character encoding standard that is maintained by the Unicode Consortium, a standards organization founded in 1991 for the internationalization of software and services. Continue Reading
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Tip
09 May 2023
How to address Python performance problems
Python is a great language for nonprogrammers to do mathematical and scientific tasks, even if such optimization impacts performance. Here's why that's not a fair criticism. Continue Reading
By- Alfred "Fred" Christianson, Developer Relief LLC
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Tip
31 Mar 2023
JavaScript vs. TypeScript: What's the difference?
TypeScript and JavaScript are two complementary technologies that are driving both front-end and back-end development. Here are the similarities and differences between the two. Continue Reading
By- Cameron McKenzie, TechTarget
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Tip
30 Mar 2023
How to apply the single responsibility principle in Java
How does the single responsibility model work in a Java program? Here we show you what this SOLID principle means, and how to implement the single responsibility model in Java. Continue Reading
By- Ashik Patel, Xennial Innovations Inc.
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Definition
28 Mar 2023
object-relational mapping (ORM)
Object-relational mapping (ORM) is a way to align programming code with database structures. Continue Reading
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Definition
22 Feb 2023
abstract class
An abstract class is a template definition of methods and variables in a specific class, or category of objects. Continue Reading
By- Alexander S. Gillis, Technical Writer and Editor
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Tip
15 Feb 2023
Why Java in 2023?
Has there ever been a better time to be a Java programmer? From new Spring releases to active JUGs, the Java platform is experiencing a renaissance. Continue Reading
By- Darcy DeClute, Scrumtuous Inc.
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Tip
27 Jan 2023
How developers can avoid remote work scams
Software developers can find good remote programming jobs, but some job offers are too good to be true. Follow these tips to spot remote job scams. Continue Reading
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Tip
12 Jan 2023
Tips and tricks for TypeScript programming
For those new to TypeScript or for Java developers transitioning into JavaScript, these three TypeScript tips and tricks modern day software developers will come in handy. Continue Reading
By- Bob Reselman, CogArtTech
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Tutorial
06 Jan 2023
11 lessons learned from writing my first Java program
You'll be amazed how easy it is to learn Java and write powerful cross-platform applications when writing your first Java program. Some misconceptions about Java just aren't true. Continue Reading
By- Darcy DeClute, Scrumtuous Inc.
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Tip
25 Oct 2022
The differences between Java and TypeScript devs must know
Do you know Java? Are you trying to learn TypeScript? Here are five differences between TypeScript and Java that will make the learning transition easier. Continue Reading
By- Bob Reselman, CogArtTech
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Tutorial
29 Sep 2022
Your top 4 Java user input strategies
From System.in to the Scanner class, there are many ways to read user input into your Java programs. Find out which Java user input strategy is best for your software needs. Continue Reading
By- Cameron McKenzie, TechTarget