ADDITIONAL SYSTEM INFORMATION :
OpenJDK 14, Fedora 30
A DESCRIPTION OF THE PROBLEM :
In Linux, .deb packaging files can get application icons provided as a set of .png files at different sizes, typically 16, 22, 24, 32, 48, 64, 72, 128 and optionally 256 and 512 as well. But JPackage only accepts a single icon file, which is the usual way for Windows (.ico file) and macOS (.icns file).
Those additional icon files could be provided to JPackage as Linux specific options.
OpenJDK 14, Fedora 30
A DESCRIPTION OF THE PROBLEM :
In Linux, .deb packaging files can get application icons provided as a set of .png files at different sizes, typically 16, 22, 24, 32, 48, 64, 72, 128 and optionally 256 and 512 as well. But JPackage only accepts a single icon file, which is the usual way for Windows (.ico file) and macOS (.icns file).
Those additional icon files could be provided to JPackage as Linux specific options.