smiklosovic commented on code in PR #2320:
URL: https://github.com/apache/cassandra/pull/2320#discussion_r1247113139


##########
build.xml:
##########
@@ -1808,11 +1816,21 @@
     <option name="ADDITIONAL_OPTIONS_STRING" value="--add-exports 
java.rmi/sun.rmi.registry=ALL-UNNAMED" />
   </component>
 </project>]]></echo>
-      <echo>"IDE configuration updated for use with JDK11"</echo>
+      <echo>"IDE configuration updated for use with 
JDK${ant.java.version}"</echo>
+      <echo>Please note that `ant realclean` does *NOT* remove 
IntelliJ-specific files</echo>
+      <echo/>
+      <echo>Warning! If you observer strange behavior in IntelliJ please</echo>
+      <echo>verify that the SDK that is being used is indeed version 
${ant.java.version}.</echo>
+      <echo>The used JDK version can be verified in Project Structure/Project 
Setting/Project</echo>
+      <echo>and Project Structure/Platform Setting/SDKs</echo>
+      <echo>In particular it is worth checking if the used JDK, typically 
named "${ant.java.version}",</echo>
+      <echo>indeed points to a java ${ant.java.version} installation.</echo>
   </target>
 
   <!-- Generate IDEA project description files -->
   <target name="generate-idea-files" 
depends="init,resolver-dist-lib,gen-cql3-grammar,generate-jflex-java,createVersionPropFile"
 description="Generate IDEA files">
+    <delete dir=".idea"/>

Review Comment:
   @michaelsembwever technically, we still do not have a way how to clean idea 
files. realclean is not removing what generate-idea-files generated. (at least 
not in this branch, right?) 
   
   That being said, why would one ever need such target anyway? It is not like 
we are switching from Netbeans to IDEA and back frequently so we need to have 
_a dedicated target for that_. At least there is less clutter. People just call 
that target once and that's it. I do not see any use case for having a separate 
target to clean it. People can just remove the files if they switch to Netbeans 
or whatever else once in 5 years. 



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