One critical tool in diagnosing memory-related issues is the Heap dump, a snapshot of an application’s memory at a particular point in time. However, as applications become larger and more intricate, heap dumps can also become massive and challenging to analyze. In this article, we will learn how to examine Heap Dump data even with lightly equipped hardware.
Java
JBang Cheatsheet (2023)
Here is my JBang cheatsheet which can help as a reference to code self-contained source-only Java programs with unmatched ease. If you are new to JBang we recommend checking this article: JBang: Create Java scripts like a pro
Migrating from Java 8 to Java 17 with OpenRewrite
In this article we will discuss on how to migrate Java applications from Java 8 to Java 17 using the OpenRewrite migration plugin. At the end of this tutorial, you will learn which are most common challenges that you can face when upgrading to Java 17 Java 8 to Java 17 challenges In pure project … Read more
Parsing PDF in Java made simple
When it comes to parsing PDF files in Java, two popular libraries stand out: Apache Tika and Apache PDFBox. Both libraries provide powerful features for working with PDF documents, but they have different approaches and trade-offs. In this article, we will explore how to parse a PDF using each library and compare their pros and … Read more
How to inspect a Thread Dump like a pro
This article will guide you in troubleshooting Java application by analysing a Thread dump with the instruments available in the JDK. We will also learn some tools to simplify our analysis.
Java 21 Unnamed Classes and Instance Main Methods
Java 21 introduces two language core features: Unnamed Java Classes and a new launch protocol which allows running Java classes in a simpler format. In this article we will cover in detail these new features explaining how they can simplify your daily Java coding.
Troubleshooting OutOfMemoryError: Direct buffer memory
An OutOfMemoryError: Direct buffer memory is a common error that Java developers encounter when working with applications that use large amounts of direct memory. Direct memory is allocated outside of the Java heap, and allows storing data that is needed by native libraries or I/O operations. In this tutorial, we will explore some common causes of this error and provide some troubleshooting steps.
How to tune the performance of Java 11 HttpClients
The Java 11 HttpClient API provides a lot of configuration options that you can use to tune its performance. In this tutorial, we will explore some of the most important ones.
Writing high performance Apache HTTP Clients
When it comes to consuming HTTP resources in Java applications, Apache HTTP Client is a popular choice for developers due to its ease of use, flexibility, and robustness. In this article, we will explore how to write a high-performance Java HTTP client using the Apache HTTP Client library.
How to solve “Too many Open Files” in Java applications
Scenario: Your application log displays the error message “Too many Open Files“. As a result, application requests are failing and you need to restart the application. In some cases, you also need to reboot your machine. In this article we will discuss File handling best practices and how to prevent File leaks in Java with proper resource management.
