Here is my Dockerfile
FROM ubuntu:20.04
# Install java 8 with apt-get
RUN apt-get update -qq && apt-get install -yqq openjdk-8-jdk
# Install java 11 with sdkman
RUN apt-get install -yqq curl unzip zip
RUN curl -s "https://get.sdkman.io" | bash
RUN /bin/bash -c "source /root/.sdkman/bin/sdkman-init.sh; sdk install java 11.0.12-open"
# Print java version
RUN java -version
RUN java -version says java 8
In interactive mode (docker run --rm -it <image-id>), it says java 11
Using RUN /bin/bash -c "source /root/.sdkman/bin/sdkman-init.sh; java -version" in the Dockerfile gives java 11
Why ? What could explain the difference between those behaviors ? Installing java 11 with apt-get doesn't give this problem, the default java version becomes 11 no matter what.