Posted on

How to Export All Modules to All Modules at Runtime in Java

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?

Posted on

Changing a Field’s Type in Recent JDKs

A couple of years ago, I attended a talk of my former colleague (but still friend) Volker Simonis. It gave me the idea to dig a bit into the subject of how to secure the JVM. From the material, I created a series of blog posts as well as a talk.

From that point on, I submitted the talk at meetups and conferences, where it was well-received. Because I like to explore different areas, I stopped to submit other proposals. Still, the talk is in my portfolio, and it was requested again in 2021. I have already presented it twice since the beginning of the year at the time of this writing.

Posted on

5 Different Ways to Create Objects in Java

Being Java developers, we usually create lots of objects daily, but we always use dependency management systems e.g. Spring to create these objects. However, there are more ways to create objects, which we will study in this article.

There are five total ways to create objects in Java, which are explained below with their examples followed by bytecode of the line which is creating the object.