What are jmods\*.jmod files in JDK 17 installation directory?

jmods\*.jmod files in JDK 17 installation directory are JMod files for Java language modules and JDK tool modules.

You can list them with the "dir/ls" command:

fyicenter$ ls -l /Library/Java/JavaVirtualMachines/jdk-17.0.5.jdk/Contents/Home/jmods/

  18415956 Sep 13 12:46 java.base.jmod
    125373 Sep 13 12:46 java.compiler.jmod
     54007 Sep 13 12:46 java.datatransfer.jmod
  13878061 Sep 13 12:46 java.desktop.jmod
     43011 Sep 13 12:46 java.instrument.jmod
    117081 Sep 13 12:46 java.logging.jmod
    900664 Sep 13 12:46 java.management.jmod
     94609 Sep 13 12:46 java.management.rmi.jmod
    469411 Sep 13 12:46 java.naming.jmod
    740328 Sep 13 12:46 java.net.http.jmod
     85836 Sep 13 12:46 java.prefs.jmod
    271905 Sep 13 12:46 java.rmi.jmod
     46206 Sep 13 12:46 java.scripting.jmod
      4669 Sep 13 12:46 java.se.jmod
    633359 Sep 13 12:46 java.security.jgss.jmod
     84157 Sep 13 12:46 java.security.sasl.jmod
     62244 Sep 13 12:46 java.smartcardio.jmod
     78483 Sep 13 12:46 java.sql.jmod
    195780 Sep 13 12:46 java.sql.rowset.jmod
      6496 Sep 13 12:46 java.transaction.xa.jmod
    672563 Sep 13 12:46 java.xml.crypto.jmod
   4645036 Sep 13 12:46 java.xml.jmod
     57007 Sep 13 12:46 jdk.accessibility.jmod
     36256 Sep 13 12:46 jdk.attach.jmod
   1914144 Sep 13 12:46 jdk.charsets.jmod
   9666773 Sep 13 12:46 jdk.compiler.jmod
    373232 Sep 13 12:46 jdk.crypto.cryptoki.jmod
    133714 Sep 13 12:46 jdk.crypto.ec.jmod
    160735 Sep 13 12:46 jdk.dynalink.jmod
      9571 Sep 13 12:46 jdk.editpad.jmod
   2256197 Sep 13 12:46 jdk.hotspot.agent.jmod
    108997 Sep 13 12:46 jdk.httpserver.jmod
    324054 Sep 13 12:46 jdk.incubator.foreign.jmod
    707536 Sep 13 12:46 jdk.incubator.vector.jmod
      9976 Sep 13 12:46 jdk.internal.ed.jmod
     93074 Sep 13 12:46 jdk.internal.jvmstat.jmod
    417054 Sep 13 12:46 jdk.internal.le.jmod
     84358 Sep 13 12:46 jdk.internal.opt.jmod
    446820 Sep 13 12:46 jdk.internal.vm.ci.jmod
      4456 Sep 13 12:46 jdk.internal.vm.compiler.jmod
      4462 Sep 13 12:46 jdk.internal.vm.compiler.management.jmod
    218727 Sep 13 12:46 jdk.jartool.jmod
   1382834 Sep 13 12:46 jdk.javadoc.jmod
    154431 Sep 13 12:46 jdk.jcmd.jmod
    476313 Sep 13 12:46 jdk.jconsole.jmod
    751918 Sep 13 12:46 jdk.jdeps.jmod
    848856 Sep 13 12:46 jdk.jdi.jmod
    137007 Sep 13 12:46 jdk.jdwp.agent.jmod
    643452 Sep 13 12:46 jdk.jfr.jmod
    409141 Sep 13 12:46 jdk.jlink.jmod
    605224 Sep 13 12:46 jdk.jpackage.jmod
    681377 Sep 13 12:46 jdk.jshell.jmod
      5563 Sep 13 12:46 jdk.jsobject.jmod
     36236 Sep 13 12:46 jdk.jstatd.jmod
  10245257 Sep 13 12:46 jdk.localedata.jmod
     81710 Sep 13 12:46 jdk.management.agent.jmod
     57020 Sep 13 12:46 jdk.management.jfr.jmod
     74232 Sep 13 12:46 jdk.management.jmod
     64673 Sep 13 12:46 jdk.naming.dns.jmod
     25671 Sep 13 12:46 jdk.naming.rmi.jmod
     29608 Sep 13 12:46 jdk.net.jmod
      5031 Sep 13 12:46 jdk.nio.mapmode.jmod
     24321 Sep 13 12:46 jdk.random.jmod
     26028 Sep 13 12:46 jdk.sctp.jmod
     72612 Sep 13 12:46 jdk.security.auth.jmod
     27661 Sep 13 12:46 jdk.security.jgss.jmod
     16438 Sep 13 12:46 jdk.unsupported.desktop.jmod
     19788 Sep 13 12:46 jdk.unsupported.jmod
     44800 Sep 13 12:46 jdk.xml.dom.jmod
    107355 Sep 13 12:46 jdk.zipfs.jmod

⇒ JDK 17 lib/modules - Runtime JImage File

⇐ JDK 17 JMod/Module Files

⇑ JDK 17 JMod/Module Files

⇑⇑ FAQ for JDK (Java Development Kit) 17