Make java 21.0.3.fx-zulu default

Author: mustard-mh

.devcontainer/Dockerfile

@@ -293,7 +293,7 @@ RUN mkdir -p ~/.terraform \
     && printf "terraform -install-autocomplete 2> /dev/null\n" >>~/.bashrc
 
 ## Java
-ENV JAVA_VERSION=11.0.27.fx-zulu
+ENV JAVA_VERSION=21.0.3.fx-zulu
 RUN curl -fsSL "https://get.sdkman.io" | bash \
     && bash -c ". /root/.sdkman/bin/sdkman-init.sh \
     && sed -i 's/sdkman_selfupdate_enable=true/sdkman_selfupdate_enable=false/g' /root/.sdkman/etc/config \

dev/image/Dockerfile

@@ -123,6 +123,17 @@ RUN install-packages netcat
 
 USER gitpod
 
+# Set up SDKMAN for gitpod user and ensure Java 21.0.3.fx-zulu is available
+RUN curl -s "https://get.sdkman.io" | bash \
+    && bash -c "source /home/gitpod/.sdkman/bin/sdkman-init.sh \
+    && sdk install java 21.0.3.fx-zulu \
+    && sdk default java 21.0.3.fx-zulu \
+    && sdk use java 21.0.3.fx-zulu"
+
+# Set Java environment variables for gitpod user
+ENV JAVA_HOME=/home/gitpod/.sdkman/candidates/java/current
+ENV PATH=$JAVA_HOME/bin:$PATH
+
 # Fix node version we develop against
 ARG GITPOD_NODE_VERSION=22.15.1
 RUN bash -c ". .nvm/nvm.sh \
@@ -133,6 +144,9 @@ ENV PATH=/home/gitpod/.nvm/versions/node/v${GITPOD_NODE_VERSION}/bin:$PATH
 ## Register leeway autocompletion in bashrc
 RUN bash -c "echo . \<\(leeway bash-completion\) >> ~/.bashrc"
 
+## Register SDKMAN initialization in bashrc
+RUN bash -c "echo 'source \"\$HOME/.sdkman/bin/sdkman-init.sh\"' >> ~/.bashrc"
+
 ### Google Cloud ###
 # not installed via repository as then 'docker-credential-gcr' is not available
 ARG GCS_DIR=/opt/google-cloud-sdk