What are jmods\*.jmod files in JDK 10 installation directory?

jmods\*.jmod files in JDK 10 installation directory are JMod files for Java language modules and JDK tool modules.

You can list them with the "dir" command:

C:>dir \fyicenter\jdk-10.0.2\jmods

          61,186 java.activation.jmod
      16,898,446 java.base.jmod
         309,161 java.base.txt
         111,345 java.compiler.jmod
       2,693,830 java.corba.jmod
          51,910 java.datatransfer.jmod
      13,459,699 java.desktop.jmod
         127,375 java.instrument.jmod
          18,885 java.jnlp.jmod
         120,707 java.logging.jmod
         887,743 java.management.jmod
          89,803 java.management.rmi.jmod
         445,939 java.naming.jmod
          48,669 java.prefs.jmod
         376,397 java.rmi.jmod
          38,233 java.scripting.jmod
           2,131 java.se.ee.jmod
           2,171 java.se.jmod
         608,670 java.security.jgss.jmod
          80,488 java.security.sasl.jmod
          52,038 java.smartcardio.jmod
          77,463 java.sql.jmod
         212,025 java.sql.rowset.jmod
           3,744 java.transaction.jmod
       1,621,426 java.xml.bind.jmod
         681,943 java.xml.crypto.jmod
       5,106,084 java.xml.jmod
           5,366 java.xml.ws.annotation.jmod
       3,137,270 java.xml.ws.jmod
         766,167 javafx.base.jmod
       2,545,259 javafx.controls.jmod
         247,618 javafx.deploy.jmod
         130,807 javafx.fxml.jmod
       6,075,153 javafx.graphics.jmod
       1,001,805 javafx.media.jmod
          85,698 javafx.swing.jmod
      20,176,200 javafx.web.jmod
         446,483 jdk.accessibility.jmod
         266,446 jdk.aot.jmod
          32,153 jdk.attach.jmod
       1,488,151 jdk.charsets.jmod
       6,889,630 jdk.compiler.jmod
         302,035 jdk.crypto.cryptoki.jmod
          95,877 jdk.crypto.ec.jmod
          50,821 jdk.crypto.mscapi.jmod
         381,539 jdk.deploy.controlpanel.jmod
       7,077,162 jdk.deploy.jmod
         162,113 jdk.dynalink.jmod
           7,031 jdk.editpad.jmod
       2,384,478 jdk.hotspot.agent.jmod
         100,028 jdk.httpserver.jmod
         589,669 jdk.incubator.httpclient.jmod
           7,319 jdk.internal.ed.jmod
          88,483 jdk.internal.jvmstat.jmod
         136,958 jdk.internal.le.jmod
          68,443 jdk.internal.opt.jmod
         402,539 jdk.internal.vm.ci.jmod
       5,859,903 jdk.internal.vm.compiler.jmod
           4,185 jdk.internal.vm.compiler.management.jmod
         239,447 jdk.jartool.jmod
       1,562,604 jdk.javadoc.jmod
       1,893,938 jdk.javaws.jmod
         107,942 jdk.jcmd.jmod
         462,668 jdk.jconsole.jmod
         705,299 jdk.jdeps.jmod
         847,049 jdk.jdi.jmod
         110,360 jdk.jdwp.agent.jmod
         426,524 jdk.jfr.jmod
         384,485 jdk.jlink.jmod
         619,605 jdk.jshell.jmod
           5,422 jdk.jsobject.jmod
          28,556 jdk.jstatd.jmod
       8,085,486 jdk.localedata.jmod
          95,005 jdk.management.agent.jmod
          11,310 jdk.management.cmm.jmod
          34,838 jdk.management.jfr.jmod
          63,247 jdk.management.jmod
         127,594 jdk.management.resource.jmod
          58,034 jdk.naming.dns.jmod
          18,744 jdk.naming.rmi.jmod
          15,677 jdk.net.jmod
         111,043 jdk.pack.jmod
       1,895,623 jdk.packager.jmod
          24,813 jdk.packager.services.jmod
       3,155,846 jdk.plugin.jmod
         990,909 jdk.plugin.server.jmod
         662,683 jdk.rmic.jmod
       2,198,748 jdk.scripting.nashorn.jmod
          50,513 jdk.scripting.nashorn.shell.jmod
          23,354 jdk.sctp.jmod
          68,515 jdk.security.auth.jmod
          24,057 jdk.security.jgss.jmod
         527,665 jdk.snmp.jmod
          18,535 jdk.unsupported.jmod
       1,940,157 jdk.xml.bind.jmod
          42,457 jdk.xml.dom.jmod
         741,348 jdk.xml.ws.jmod
          88,652 jdk.zipfs.jmod
           2,626 oracle.desktop.jmod
           9,391 oracle.net.jmod

⇒ JDK 10 lib/modules - Runtime JImage File

⇐ JDK 10 Installed Directories and Files

⇑ Download and Use JDK 10

⇑⇑ FAQ for JDK (Java Development Kit)