As non-computer-science background person, it is high probability that I might not know what is Java. Therefore, it is better to show case how can we "Ensure I have Java 11 installed on your device."
This may be escalated to severity.Medium because, I believe that most non-computer-science background person does not know how to check their java version. And I believe most PCs are installed with higher version of Java instead of Java 11.
Small nit pick here!
As non-computer-science background person, it is high probability that I might not know what is Java. Therefore, it is better to show case how can we "Ensure I have Java 11 installed on your device."
This may be escalated to severity.Medium because, I believe that most non-computer-science background person does not know how to check their java version. And I believe most PCs are installed with higher version of Java instead of Java 11.