DEV Community

rafaone
rafaone

Posted on

1 2

Adding new JRE/JDK ubuntu

This command helps you to add an alternative JDK/JRE a like Azul/Zulu or adoptopenjdk.

After extract your JDK/JRE usually we extract on "/usr/lib/jvm" debian/ubuntu systems.

We will need 3 commands if we are adding a JDK.

To Set directly

sudo update-alternatives — set java <Directory where JAVA has been extracted>/bin/java
sudo update-alternatives — set javac <Directory where JAVA has been extracted>/bin/ javac
sudo update-alternatives — set javaws <Directory where JAVA has been extracted>/bin/javaws
Enter fullscreen mode Exit fullscreen mode

To install as new option

sudo update-alternatives — install “/usr/bin/java” “java” “<Directory where JAVA has been extracted>/bin/java” 1
sudo update-alternatives — install “/usr/bin/javac” “javac” “<Directory where JAVA has been extracted>/bin/javac” 1
sudo update-alternatives — install “/usr/bin/javaws” “javaws” “<Directory where JAVA has been extracted>/bin/javaws” 1

Enter fullscreen mode Exit fullscreen mode

And to select a new one

sudo update-alternatives — config java
Enter fullscreen mode Exit fullscreen mode

Top comments (0)

Great read:

Is it Time to go Back to the Monolith?

History repeats itself. Everything old is new again and I’ve been around long enough to see ideas discarded, rediscovered and return triumphantly to overtake the fad. In recent years SQL has made a tremendous comeback from the dead. We love relational databases all over again. I think the Monolith will have its space odyssey moment again. Microservices and serverless are trends pushed by the cloud vendors, designed to sell us more cloud computing resources.

Microservices make very little sense financially for most use cases. Yes, they can ramp down. But when they scale up, they pay the costs in dividends. The increased observability costs alone line the pockets of the “big cloud” vendors.