Sets up Java logging for r5r and ensures Java SE Development Kit 21 is installed.
Details
This function initializes the Java Virtual Machine (JVM) with a log path for r5r, and checks that the installed Java version is 21. If not, it stops with an informative error message and download links.
See also
Other support functions:
exists_tiff()
,
fileurl_from_metadata()
,
stop_r5()
,
tempdir_unique()
,
validate_bad_osm_ids()