Can't find idlj tool for compiling .idl files. Checked /usr/bin and /usr/lib/jvm/java-11-jdk. Isn't it bundled with the JDK? How to add the idlj compiler?
P.S. I'm more of a Python guy, and don't use Java a lot. So I'm sorry if it's a dumb question.
As per JEP 320: Remove the Java EE and CORBA Modules the idlj compiler was removed together with other CORBA technologies. From Java 11 forward CORBA stack is no longer maintained in the JDK:
Since the costs of maintaining CORBA support outweigh the benefits, there is no case for the Java SE Platform or the JDK to include it.
As per this answer you can try replacing it with Glassfish CORBA ORB project.