Curated Collection of Java, Groovy, and Python Articles

Language Collection

FunTester, a tester who only knows to make up nonsense, a nuclear‑bomb style tester, where quantitative change leads to qualitative change.

Java

Print a Heart Shape with One Line of Java Code

Atomicity of Operations and Thread Safety

Look, i++ Is Really Unsafe

Combining Atomic Operations and Thread Safety

New Solution for Outputting an Equilateral Triangle Using Java For Loop

What Exactly Executes Before the main Method?

What Exactly Is Passed as Parameters?

What Happens When You Put null into JSON?

Why Does the Process Continue After the Main Thread Ends?

How to Execute Groovy Script Files in Java Test Frameworks

Verifying Shallow and Deep Copy via JVM Heap Analysis

How to Learn Java Fundamentals

How to Preserve HTTPRequestBase and CloseableHttpResponse

Ensuring Thread Safety in Anonymous Thread Subclasses

Interface Fields and Instance Methods in Java

Server Performance Optimization: Double‑Checked Locking

Java Concurrency Bugs: Basics

Java Concurrency Bugs: Advanced

Graphical Output of Test Data in Performance Testing

Bug Share: Massive Objects Causing Excessive Full GC

Using ThreadLocal to Solve Thread Synchronization Issues

Are Objects in Thread‑Safe Collections Truly Safe?

How to Parse Dates Using "dd MM"

Using Regular Expressions in Java and Groovy

Java Hotspot Code Running Faster and Faster

Groovy

Resolving "Cannot Find Matching Error" When Mixing Java and Groovy

Using Groovy Stream Syntax for Recursive Prime Number Filtering Within N

Performing Bash (Shell) Operations with Groovy

Easy Database Operations with Groovy and Gradle

Enjoyably Using the Groovy Shell

Gradle + Groovy Basics

Gradle + Groovy Advanced

Operator Overloading in Groovy

Processing JMeter Assertions and Logs with Groovy

Handling JMeter Variables Using Groovy

Executing Command Line in JMeter via Groovy

Processing Request Parameters in JMeter with Groovy

Using Regular Expressions in Java and Groovy

Tuples in Groovy

Eight‑Stage Evolution from Java to Groovy

Using Regular Expressions for Extraction and Assignment in JMeter with Groovy

Python

Using Python's filter for Recursive Prime Number Filtering Within N (Prime) – Includes Code Analysis for Printing a Heart Shape

Using Python's filter for Recursive Prime Number Filtering Within N (Prime) – Includes Code Analysis for Printing a Heart Shape

Sharing Experience with Python‑Based WeChat Usage

Using Recursive Filtering in Python to Find Twin Primes Within N

Example of an Auto‑Reply WeChat Bot Using Python wxpy and requests