what jdk for build?

Hi,

I have accumulated a confusing number of jdk's, to the extent that I
am reduced to trying things at random.  I think that it would be good
to straighten these out before I ask about my failure building
LibreOffice Viewer.

My build for Linux has been working with
    --with-jdk-home=/usr/lib/jvm/default-java
which points to 
    java-1.11.0-openjdk-amd64
which I believe simply comes with debian buster.

An early attempt to build Viewer for Android required a 32-bit jdk, so
I installed debian package
    openjdk-11-jdk:i386

Places on my system with bin/java which configure has accepted without
explicit error message as values for --with-jdk-home are
    /usr/lib/jvm/java-11-openjdk-amd64
    /usr/lib/jvm/java-11-openjdk-i386
    /usr/local/android-studio/jre

Advice welcome.

I have not seen--or I have forgotten--direction about this on the
development wiki.  Is there a place where it should be?

Thank you for your attention,
Terry.