Scala data flow analysis in IDEA - scala

Does it work? The options are greyed out for me, just want to make sure I'm not missing any setting.
My IDEA version is:
IntelliJ IDEA 2016.3.4
Build #IU-163.12024.16, built on January 31, 2017
JRE: 1.8.0_112-release-408-b6 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o

It's not supported for Scala at the moment, you can vote for this request:
SCL-8555 "Analyze Dataflow" Doesn't work In Scala

Related

scala compile server stopped due to inactivity | intellijIDEA

This never happened as I never turn off my pc. Seeing this message after recent update.
IntelliJ IDEA 2022.3 (Community Edition)
Build #IC-223.7571.182, built on November 29, 2022
Runtime version: 17.0.5+1-b653.14 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Windows 11 10.0
It's OK. If you want to change this behavior:
File -> Settings -> Build, Execution, Deployment -> Compiler -> Scala Compiler -> Scala Compile Server and there is an option Stop if idle for with a default 120 second value.

sdkman! How to manage pre-existing JDK?

I wanted to try Java 19 and have easy switching back to the Java 17 that I have already installed.
So, I installed sdkman but it knows nothing of the previous Java.
Found the "install local" command, used it to link the java 17 location to a unique name and sdkman seems happy, as it reports "Done installing!".
After that the "sdk current java" returns "Not using any version of java".
So then I tried "sdk use java [my unique name]. That was also accepted.
But still the "sdk current java" response is unchanged.
Have I misunderstood how this should work? I want to be sure sdkman knows what is there already before I add another Java.
Thanks for your advice!
Terminal commands follow (Kubuntu 22.04)
john#NUC8i3BEH:~$ java -version
openjdk version "17.0.4.1" 2022-08-12 LTS
OpenJDK Runtime Environment (build 17.0.4.1+1-LTS)
OpenJDK 64-Bit Server VM (build 17.0.4.1+1-LTS, mixed mode, sharing)
john#NUC8i3BEH:~$ sdk install java 17.0.4.1-Bellsoft /usr/lib/jvm/bellsoft-java17-full-amd64
Invalid version! 17.0.4.1-Bellsoft with length 17 exceeds max of 15!
john#NUC8i3BEH:~$ sdk install java 17.0.4.1-Bell /usr/lib/jvm/bellsoft-java17-full-amd64
Linking java 17.0.4.1-Bell to /usr/lib/jvm/bellsoft-java17-full-amd64
Done installing!
john#NUC8i3BEH:~$ sdk list
john#NUC8i3BEH:~$ sdk current
No candidates are in use
john#NUC8i3BEH:~$ sdk current java
Not using any version of java
john#NUC8i3BEH:~$ sdk list java
john#NUC8i3BEH:~$ sdk use java 17.0.4.1-Bell
==== BROADCAST =================================================================
* 2022-09-21: neo4jmigrations 1.12.0 available on SDKMAN! https://github.com/michael-simons/neo4j-migrations/releases/tag/1.12.0
* 2022-09-21: micronaut 3.7.0 available on SDKMAN!
* 2022-09-20: quarkus 2.12.3.Final available on SDKMAN! https://github.com/quarkusio/quarkus/releases/tag/2.12.3.Final
================================================================================
Setting java version 17.0.4.1-Bell as default.
Using java version 17.0.4.1-Bell in this shell.
john#NUC8i3BEH:~$ java -version
openjdk version "17.0.4.1" 2022-08-12 LTS
OpenJDK Runtime Environment (build 17.0.4.1+1-LTS)
OpenJDK 64-Bit Server VM (build 17.0.4.1+1-LTS, mixed mode, sharing)
john#NUC8i3BEH:~$ sdk current java
Not using any version of java
john#NUC8i3BEH:~$
OK, I should have tried harder.
I installed Java 19 with sdkman then the command "sdk default java [my old version]" switches back as required.

Building Kotlin Multiplatform app with Xcode Cloud

as Apple announced that Xcode Cloud is now available for all developers, I tried to set it up for a Kotlin Multiplatform project. The start was a little bit hard tbh. Currently I am facing following problem during a simple test action:
The operation couldn’t be completed. Unable to locate a Java Runtime.
Please visit http://www.java.com for information on installing Java.
Command PhaseScriptExecution failed with a nonzero exit code
So I tried to install a jdk during the ci_post_clone.sh phase. The output of java -version after the installation on the Xcode Cloud is the following:
openjdk version "17.0.2" 2022-01-18
OpenJDK Runtime Environment (build 17.0.2+8-86)
OpenJDK 64-Bit Server VM (build 17.0.2+8-86, mixed mode, sharing)
Installed java
also ./gradlew -v output:
Showing All Messages
------------------------------------------------------------
Gradle 7.4.2
------------------------------------------------------------
Kotlin: 1.5.31
Groovy: 3.0.9
Ant: Apache Ant(TM) version 1.10.11 compiled on July 10 2021
JVM: 17.0.2 (Oracle Corporation 17.0.2+8-86)
OS: Mac OS X 12.4 x86_64
Nevertheless, I still get the same error. Is this maybe a restriction by Apple?
Any ideas?

java web start fails to locate java runtime

Hi I am trying to run javaws but it prompts:
To open this Web Start application you need to download the Java Runtime Environment.
I am sure JRE is installed, maybe javaws does not find it, how do I fix that?
Johns-MacBook-Pro:~ johnmactavish$ java --version
java 13.0.2 2020-01-14
Java(TM) SE Runtime Environment (build 13.0.2+8)
Java HotSpot(TM) 64-Bit Server VM (build 13.0.2+8, mixed mode, sharing)
Johns-MacBook-Pro:~ johnmactavish$ javaws
No Java runtime present, requesting install.
Unable to locate a Java Runtime to invoke.
Johns-MacBook-Pro:~ johnmactavish$
Java Web Start (javaws) was deprecated in Java 9 and removed in Java 11.
As you are using java 13, you can either downgrade from 13 to 8, or look for alternatives.
Perhaps an alternative such as https://openwebstart.com/ can help you out with that.
P.S: In case you're using tools to manage version such as sdkman or such, there might be the case where it's also not available in SDKs # version 8 provided by sdkman.

100% CPU usage when running SBT tasks in IntelliJ on Windows 10

I'm running into an issue using IntelliJ on Windows 10 where running an SBT task appears to consume 100% of a core in a busy loop waiting for input. Has anyone else run into this issue?
JDK (Oracle 1.8.0_72, OpenJDK 1.8.x, Azul Zing)
java version "1.8.0_152"
Java(TM) SE Runtime Environment (build 1.8.0_152-b16)
Java HotSpot(TM) 64-Bit Server VM (build 25.152-b16, mixed mode)
JRE: 1.8.0_152-release-1024-b8 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Library Dependencies
Scala 2.12
sbt 1.0.4 (also occurs with 1.1.0)
IntelliJ IDEA 2017.3.2 (Community Edition)
Build #IC-173.4127.27, built on December 25, 2017
Expected Behavior
Run project using IntelliJ IDEA
Wait for compilation to complete
Project idles with little to no CPU usage
Actual Behavior
Run project using IntelliJ IDEA
Wait for compilation to complete
Project uses ~15 - 20% CPU (1 core on a Core i7 7700HQ) - 1 thread is in a tight loop that results in 100% usage of 1 core.
If I run the project via the SBT shell outside of IntelliJ (e.g. via the terminal), there is much lower CPU usage (~1-5% total, as opposed to ~20% in IntelliJ). If I run the project in the IntelliJ SBT shell prompt, I experience similar high CPU usage.
Thread profile
sbt -> PlayConsoleInteractionMode
CPU usage