ask, Command error J2ME LWUIT - forms

I have an error to add a command button in my project using LWUIT 1.5
this is my code
initialitation :
Command backCommand = new Command("Back", Command.BACK, 0);
f.addCommand(backCommand);
f.setCommandListener(this);
and this is an error
cannot find symbol symbol: method addCommand
(javax.microedition.lcdui.Command) location:
class.com.sun.lwuit.Form
--
please help me T.T, THANSK for the answer

It seems that you are using Command object from the lcdui lib. Check your class imports and add the Commandobject from the LWUIT lib.

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Intellij IDEA Error: Could not find or load main class org.jetbrains.jps.cmdline.Launcher in Scala Project

I am facing the following error when I click Run from simple Hello World program of Scala. I am unable to find any solution as I am beginner in the Java field.
I am currently using IntelliJ IDEA 2021.2.3 which I am trying to integrate with Scala but to no avail.I am following this tutorial to run the Scala Program and Install all the required softwares and libraries as mentioned in this link.
https://www.guru99.com/scala-tutorial.html
Screenshot - Intellij IDEA Error for Scala Program
"C:\Program Files\Java\jdk1.8.0_144\bin\java.exe" -Xmx700m -Djava.awt.headless=true -Djava.endorsed.dirs=\"\" -Dpreload.project.path=D:/Scala-Projects -Dpreload.config.path=C:/Users/Khalid/AppData/Roaming/JetBrains/IdeaIC2021.2/options -Dcompile.parallel=false -Drebuild.on.dependency.change=true -Djdt.compiler.useSingleThread=true -Daether.connector.resumeDownloads=false -Dio.netty.initialSeedUniquifier=-2427656205608767245 -Dfile.encoding=windows-1252 -Duser.language=en -Duser.country=US -Didea.paths.selector=IdeaIC2021.2 -Didea.home.path=D:/Softwares/ideaIC-2021.2.3.win -Didea.config.path=C:/Users/Khalid/AppData/Roaming/JetBrains/IdeaIC2021.2 -Didea.plugins.path=C:/Users/Khalid/AppData/Roaming/JetBrains/IdeaIC2021.2/plugins -Djps.log.dir=C:/Users/Khalid/AppData/Local/JetBrains/IdeaIC2021.2/log/build-log -Djps.fallback.jdk.home=D:/Softwares/ideaIC-2021.2.3.win/jbr -Djps.fallback.jdk.version=11.0.12 -Dio.netty.noUnsafe=true 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Error: Could not find or load main class org.jetbrains.jps.cmdline.Launcher
Make sure you are correctly specified the main class in Run configuration dialog:
You can open it from the main toolbar:

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