Hanno Embregts

Java Developer & Speaker, strong with the Force - full bio

Posts labeled 'java'

Eleven crazy learnings from the Java 11 certification: wrapper objects - passing arguments to method references (11/11)

Posted on 06 Sep 2022 by Hanno Embregts java certification

In the summer of 2021, I got my Java 11 certification. I expected it to be quite a breeze, because I’d been a Java developer for 14 years and surely I should have seen it all by now, right? Turned out I was very wrong. I came across lots of things that I didn’t even know were possible with Java. In this weekly blog series I will go through 11 of these ‘crazy learnings’ that surprised me the most, even as an experienced developer. The final ‘crazy learning’ I’ll be blogging about has to do with method references.

Eleven crazy learnings from the Java 11 certification: wrapper objects - functional interfaces actually CAN contain multiple abstract methods (10/11)

Posted on 30 Aug 2022 by Hanno Embregts java certification

In the summer of 2021, I got my Java 11 certification. I expected it to be quite a breeze, because I’d been a Java developer for 14 years and surely I should have seen it all by now, right? Turned out I was very wrong. I came across lots of things that I didn’t even know were possible with Java. In this weekly blog series I will go through 11 of these ‘crazy learnings’ that surprised me the most, even as an experienced developer. We’re diving into functional interfaces today.

Eleven crazy learnings from the Java 11 certification: wrapper objects - some are more equal than others (9/11)

Posted on 23 Aug 2022 by Hanno Embregts java certification

In the summer of 2021, I got my Java 11 certification. I expected it to be quite a breeze, because I’d been a Java developer for 14 years and surely I should have seen it all by now, right? Turned out I was very wrong. I came across lots of things that I didn’t even know were possible with Java. In this weekly blog series I will go through 11 of these ‘crazy learnings’ that surprised me the most, even as an experienced developer. Today is about equality when you’re dealing with wrapper objects.

Eleven crazy learnings from the Java 11 certification: equality in cloned arrays (8/11)

Posted on 16 Aug 2022 by Hanno Embregts java certification

In the summer of 2021, I got my Java 11 certification. I expected it to be quite a breeze, because I’d been a Java developer for 14 years and surely I should have seen it all by now, right? Turned out I was very wrong. I came across lots of things that I didn’t even know were possible with Java. In this weekly blog series I will go through 11 of these ‘crazy learnings’ that surprised me the most, even as an experienced developer. We’ll dive into array equality today.

Eleven crazy learnings from the Java 11 certification: the crazy stuff that is allowed in switch statements (7/11)

Posted on 09 Aug 2022 by Hanno Embregts java certification

In the summer of 2021, I got my Java 11 certification. I expected it to be quite a breeze, because I’d been a Java developer for 14 years and surely I should have seen it all by now, right? Turned out I was very wrong. I came across lots of things that I didn’t even know were possible with Java. In this weekly blog series I will go through 11 of these ‘crazy learnings’ that surprised me the most, even as an experienced developer. Today we’ll look at the crazy stuff that is allowed in switch statements.

Eleven crazy learnings from the Java 11 certification: method overloading priorities (6/11)

Posted on 02 Aug 2022 by Hanno Embregts java certification

In the summer of 2021, I got my Java 11 certification. I expected it to be quite a breeze, because I’d been a Java developer for 14 years and surely I should have seen it all by now, right? Turned out I was very wrong. I came across lots of things that I didn’t even know were possible with Java. In this weekly blog series I will go through 11 of these ‘crazy learnings’ that surprised me the most, even as an experienced developer. This week’s blog is about about method overloading priorities.

Eleven crazy learnings from the Java 11 certification: division by zero (5/11)

Posted on 26 Jul 2022 by Hanno Embregts java certification

In the summer of 2021, I got my Java 11 certification. I expected it to be quite a breeze, because I’d been a Java developer for 14 years and surely I should have seen it all by now, right? Turned out I was very wrong. I came across lots of things that I didn’t even know were possible with Java. In this weekly blog series I will go through 11 of these ‘crazy learnings’ that surprised me the most, even as an experienced developer. This week we’ll get mathematical as we focus on dividing by zero in Java.

Eleven crazy learnings from the Java 11 certification: anonymous subclasses in enums (4/11)

Posted on 19 Jul 2022 by Hanno Embregts java certification

In the summer of 2021, I got my Java 11 certification. I expected it to be quite a breeze, because I’d been a Java developer for 14 years and surely I should have seen it all by now, right? Turned out I was very wrong. I came across lots of things that I didn’t even know were possible with Java. In this weekly blog series I will go through 11 of these ‘crazy learnings’ that surprised me the most, even as an experienced developer. This week we’ll focus on anonymous subclasses in enums.

Eleven crazy learnings from the Java 11 certification: accessing static interface methods (3/11)

Posted on 12 Jul 2022 by Hanno Embregts java certification

In the summer of 2021, I got my Java 11 certification. I expected it to be quite a breeze, because I’d been a Java developer for 14 years and surely I should have seen it all by now, right? Turned out I was very wrong. I came across lots of things that I didn’t even know were possible with Java. In this weekly blog series I will go through 11 of these ‘crazy learnings’ that surprised me the most, even as an experienced developer. This week is about accessing static interface methods.

Eleven crazy learnings from the Java 11 certification: stream elements should implement Comparable (2/11)

Posted on 05 Jul 2022 by Hanno Embregts java certification

In the summer of 2021, I got my Java 11 certification. I expected it to be quite a breeze, because I’d been a Java developer for 14 years and surely I should have seen it all by now, right? Turned out I was very wrong. I came across lots of things that I didn’t even know were possible with Java. In this weekly blog series I will go through 11 of these ‘crazy learnings’ that surprised me the most, even as an experienced developer. This week we dive into stream elements.

Eleven crazy learnings from the Java 11 certification: a few freaky array declarations (1/11)

Posted on 28 Jun 2022 by Hanno Embregts java certification

In the summer of 2021, I got my Java 11 certification. I expected it to be quite a breeze, because I’d been a Java developer for 14 years and surely I should have seen it all by now, right? Turned out I was very wrong. I came across lots of things that I didn’t even know were possible with Java. In this weekly blog series I will go through 11 of these ‘crazy learnings’ that surprised me the most, even as an experienced developer. We start off with a few freaky array declarations.

Do you know Java? Care to prove it?

Posted on 11 Feb 2022 by Hanno Embregts, Steve Poole & Martijn Verburg java conference

Here’s your chance to share your knowledge about Java, the JVM and all its offshoots, side alleys, traps, pitfalls, amazing capabilities and history. Know a cool fact about Kotlin? Got the low down on what colour James Gosling’s car was when he invented Java? Can you explain how to use caching in Spring?

Pattern matching will make Java an even more powerful language

Posted on 10 Jun 2021 by Hanno Embregts & Peter Wessels java pattern-matching

We’ve known lambdas and streams since Java 8, and they’ve made Java a more powerful language. In the next few versions of Java, even more features that originated in functional languages will be added, one of which is pattern matching. It provides an elegant way to apply conditions to certain aspects of an object. We set out to investigate the possibilities that were introduced in JEP 305 (‘Pattern Matching for instanceof’) and how the pattern matching roadmap will make Java an even more powerful language.

Congratulations Java, and many happy returns!

Posted on 23 May 2020 by Hanno Embregts java

Today is Java’s 25th birthday! On the 23rd of May 1995 the language was introduced at the SunWorld conference, in a time where desktop applications reigned supreme and the internet was still in its infancy.