Install JDK

Oracle recommends the Java SE Development Kit. The modules are using Spring Boot 3.3.x so Java 21 is required.

1. Download and install the Java Development Kit

   Download the latest x64 Java 21 Development Kit from Java SE Development Kit.

   Decompress the archive in your chosen location, e.g., your home directory and then add it to your path (the exact version of Java might differ in your environment):

   export JAVA_HOME=$HOME/jdk-21.0.3
   export PATH=$JAVA_HOME/bin:$PATH

2. Verify the installation

   Verify the Java Development Kit is installed with this command (the exact version of Java might differ in your environment):

   $ java -version
   java version "21.0.3" 2022-04-19 LTS
   Java(TM) SE Runtime Environment (build 21.0.3+8-LTS-111)
   Java HotSpot(TM) 64-Bit Server VM (build 21.0.3+8-LTS-111, mixed mode, sharing)

   Note: Native Images: If you want to compile your Spring Boot microservices into native images, you must use GraalVM, which can be downloaded from here.