Virtual package java6-sdk-headless is provided by:
Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture +++-=============================-===================-==================================== ii default-jdk-headless 2:1.17-74 amd64 Standard Java or Java compatible Development Kit (headless) un openjdk-11-jdk-headless <none> <none> (no description available) ii openjdk-17-jdk-headless:amd64 17.0.11+9-1~deb12u1 amd64 OpenJDK Development Kit (JDK) (headless) ii openjdk-21-jdk-headless:amd64 21.0.1+12-2 amd64 OpenJDK Development Kit (JDK) (headless) 4 packages