src/jdk.jpackage/share/classes/jdk/jpackage/internal/Arguments.java

*** 261,272 ****
  
          }),
  
          ADD_LAUNCHER ("add-launcher",
                      OptionCategories.PROPERTY, () -> {
              context().addLaunchers.add(
!                 new AddLauncherArguments(popArg()));
          }),
  
          TEMP_ROOT ("temp-root", OptionCategories.PROPERTY, () -> {
              context().buildRoot = popArg();
              context().userProvidedBuildRoot = true;
--- 261,280 ----
  
          }),
  
          ADD_LAUNCHER ("add-launcher",
                      OptionCategories.PROPERTY, () -> {
+             String spec = popArg();
+             String name = null;
+             String filename = spec;
+             if (spec.contains("=")) {
+                 String[] values = spec.split("=", 2);
+                 name = values[0];
+                 filename = values[1];
+             }
              context().addLaunchers.add(
!                 new AddLauncherArguments(name, filename));
          }),
  
          TEMP_ROOT ("temp-root", OptionCategories.PROPERTY, () -> {
              context().buildRoot = popArg();
              context().userProvidedBuildRoot = true;