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Analyzing garbage collection logs provides several advantages like it reduces GC pause time, reduces cloud computing cost, predicts outages, provides effective metrics for capacity planning. To learn about the profound advantages of GC log analysis, please refer to this post. In this post let’s learn how to analyze GC logs?
Basically, there are 3 essential steps when it comes to GC log analysis:
Due to the new module system, Java 9 does not allow an application by default to see all classes from the JDK, unlike all previous versions of Java. If we try to access some reserved module, we obtain an error like this:module <module-name> does not "opens <package-name>" to unnamed module.
Everyone knows that we can solve this exception by using the JVM parameters --add-exports or add-opens, but what if we have more environments, and we don't want to have to change JVM arguments across these environments?
Have you ever had the need to build a comma-separated list of values from a list or an array in Java or wanted to create a file path using concatenated folder names and a file path delimiter? Well, in the article Cocatenating Strings in Java 8, I have described a convinient way to use Java 8 APIs to do the job.
This not only reduces your development time and prevents additional errors, but it also let's you write more readable and understandable code. But what exactly happened since Java 9 was released, and does it apply to the code presented in the cases described in the aforementioned article.
Preparing for an interview? Want to just revisit Java SE 9 features? Trying to recollect or revise Java SE programming constructs? Let me take you back in time to what was introduced first in Java SE 9? Join me for this tutorial series on Java as we all eagerly await the official release of Java SE 14!
As I promised, I am back with the code samples of my earlier article Java SE 9... What's New? You may refer the earlier article to understand the newly introduced features at a high level. This article provides the code samples for each of the features.
You may download the code samples for the following new features here. (Import as eclipse project, set compiler/environment as Java 9. Run the main class 'Java9Application' to see the output/outcome of the Code Samples.)
I plan to start by re-visiting a Java 8 feature, Default Interface Methods.
You can use this guide to find and install the latest Java, understand the differences between Java distributions (AdoptOpenJdk, OpenJDK, OracleJDK, etc.), as well as get an overview of Java language features, including Java versions 8-13.
You may also like: Beyond Java 8
First, let’s have a look at some common, practical questions that people have when trying to choose the right Java version for their project.
Hi, Spring fans! In this installment, Josh Long (@starbuxman) talks to Manning's The Java Module System author Nicolai Parlog (@nipafx) about Java modularity. Let's get started.
As a programmer, you want to explore new things. Learning a new language gives you a different perspective when solving problems.
So what are the five languages that a Java developer must explore?
In my previous article, I wrote about the Modularity System, which was introduced in Java 9. This was the most major feature of the release, but there are other significant ones which worth to mention. With this writing, I would like to continue the Java evolution line by taking a glance about the main Java 9 features according to the performance improvements.
In Java 9, the most significant performance upgrade was concerned with the Garbage Collection. They introduced a new default one and removed the olds.
Although Java 9 is not the latest JDK release (to be more specific, it was released back in 2017), it was the biggest update in the history of the JDK. Despite that, most Java programmers hardly mention its most significant feature — the Java Platform Module System.
This is primarily because most business applications still use Java 8. For now, it has demonstrated stability and newer releases need time to spread across the IT world.
In this article, I talk about my impressions from the JavaLand 2019 conference. This was my second time at the international conference, which, this year, took place in the theme park "Phantasialand" in Bruehl, near Cologne, Germany, from March 18th-20th.
Additionally, you can download the presentations here, as well as lecture recordings here.
It’s been more than a year since JDK 9 was released, and if you haven't touched Java 9, this year is probably the best time to learn Java 9 and get yourself familiar with new features and enhancements on existing APIs. The highlight of JDK 9 release was Project Jigsaw or Module System.
The Java 9 Platform Module System allows Java to move forward by modularizing the JDK as well as adding modules as first-class citizens to Java, but that’s not the only thing to look forward, there are many small changes that are very useful in day-to-day coding.
The Tascalate Concurrent library provides an implementation of the CompletionStage interface and related classes. These are designed to support long-running blocking tasks (typically, I/O bound). This functionality augments the sole Java 8 built-in implementation, CompletableFuture, that primarily supports computational tasks. Also, the library helps with numerous asynchronous programming challenges like handling timeouts, retry/poll functionality, orchestrating results of multiple concurrent computations, and similar.
The library is shipped as a multi-release JAR and may be used both with Java 8 as a classpath library or with Java 9+ as a module.