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Cannot determine path to 'tools.jar' library for 18 (C:/Program Files/jdk-18.0.1.1)

i want to run my code in intellij ide (community edition)
and when i try to run it, i got this error
Cannot determine path to 'tools.jar' library for 18 (C:/Program
Files/jdk-18.0.1.1)
This is the ScreenShot of the error
help me pls... i want to learn kotlin use intellij ide
And this is my JAVA_HOME
version ide : 2020.2
Thank you :)

The problem is with version of JDK you are using. The Intellij version 2020.2 supports only upto JDK 14. So either you have to lower the JDK version to 14 or update the IntelliJ to a newer version like 2021.

I faced the same error recently (Nov 2022)
Error:Cannot determine path to 'tools.jar' library for 17 (C:\Program Files\Java\jdk-17.0.5)
when using IntelliJ IDEA 2020.1.4 with JDK 17.0.5. Issue is resolved by switching to open JDK amazon-corretto-11, you can download it from here https://docs.aws.amazon.com/corretto/latest/corretto-11-ug/downloads-list.html
Amazon Corretto is a no-cost, multiplatform, production-ready distribution of the Open Java Development Kit (OpenJDK). Corretto comes with long-term support that includes performance enhancements and security fixes.

Apache NetBeans IDE 12.0 cannot create new java application

I installed Java NetBeans IDE 12.0 and JDk-16. When I try to create a project using Java With Ant, it get stuck like in the screenshot. When I cancel it, it creates the file but no code in it i.e., no main method is created. Just a blank file.
Does anyone know how to solve this?

From the NetBeans documentation for "Deployment Platforms" for NetBeans 12.0:
Apache NetBeans 12.0 runs on the JDK LTS releases 8 and 11, as well as
on JDK 14, i.e., the current JDK release at the time of this NetBeans
release.
NetBeans may work (or appear to work) with newer JDK releases that are not officially supported such as JDK 16, but you run the risk of hitting unexpected problems.
So if you don't need any Java features released after JDK 14, download and install JDK 14, and add it as a Java platform in NetBeans, using Tools > Java Platforms > Add Platform.... You don't need to uninstall JDK 16.
However, if you really need JDK 16 features then use a different IDE. The latest release of Eclipse, 2021-03, explicitly supports JDK 16.

I had the same problem and was able to solve it in windows by following the steps below:
Uninstall Netbeans 12.4. Make sure to delete all the cache files
(Drive:\users\user\AppData\Roaming\Netbeans and
Drive:\users\user\AppData\Local\Netbeans) (Windows)
Check your JDK 16 directory (no JRE) and environment variables JAVA_HOME, CLASSPATH and PATH.
Install Netbeans 12.4
Create new project and check that you select Download and activate nb-javac.

For me it helped using NetBeans version 12.5 and the JDK 14. After that everything was running smooth.

I had the same problem and upgrading to version 12.5 worked for me.

Trouble setting up JDK in eclipse

COMPANY-0034:Home deter_dangler$ pwd
/Library/Java/JavaVirtualMachines/jdk-9.0.4.jdk/Contents/Home
COMPANY-0034:Home deter_dangler$ ls
README.html conf jmods lib
bin include legal release
COMPANY-0034:Home deter_dangler$
Terminal shows I have JDK 9.0 installed and I configured JAVA SE 9.0 in eclipse as below:
But when I am trying configure build path for any Java project as below, it shows Native Library Location as 'None' and shows errors in my .Java file:
What is missing?
EDIT:
Version: Kepler Service Release 1
Build id: 20130919-0819

According to Eclipse's website, (here), Java 9 is only officially supported on Eclipse Oxygen.
If you can, I recommend upgrading to Oxygen so you can avoid compatibility issues.

Installing NetBeans 8.0.2 with JDK 9.0.1

When I try to install NetBeans 8.0.2 on my PC (Win10-64bit) I get the error message:
despite that I already installed JDK 9.0.1, as evident in the command prompt:
My path variables are set as follows:

AFAIK Netbeans which supports JDK 9 is yet to release (i.e, Netbeans 9.0 which is in development mode).
And the documentation states this.
By: jkovalsky, 09 Oct 2017
If you have downloaded JDK 9 recently and try to convince your NetBeans 8.2 IDE to run on top of it we will probably disappoint you, because 8.2 version is not designed to work with JDK 9.
In order to use JDK 9 happily you will need to download a NetBeans 9.0 development build from Apache Incubator. For more information please read Geertjan Wielenga's post on Using Apache NetBeans IDE.
Thank you!
NetBeans team
I've also faced the same issue with Netbeans 8.2 (but you're trying with Netbeans 8.0.2). So, I installed JDK 8 and the Netbeans installation went fine.
Still if you want to use JDK 9 you can install it alongside with JDK 8. But you need to set JDK path as JDK 8 in the system path (like you did for JDK 9). While installing Netbeans select JDK 8 installation path as JDK for Netbeans.
I hope it'll be helpful.

As mentioned, you are getting error when trying to install NetBeans, in that case you can specify the JDK at command line
<netbeans_installer>.exe --javahome "C:\Program Files\Java\jdk1.9.0"
FaqSuitableJvmNotFound

Target is not a JDK root. System library was not found. Eclipse Oxygen 4.7 + Java9 error

I'm trying to test JDK9 (jdk-9-ea+147 version) with Eclipse Oxygen IDE.
I've installed jdk along with jre. From Eclipse Market Place I've installed Java9 Beta extension:
The problem is, when I'm trying to add new installed jre from Eclipse I get following error:
Interesting thing is that this error doesn't occur with installations of previous JDK versions:
Does anyone encounter simillar problem with Eclipse Oxygen? Any feedback is appreciated.

I've just successfully tested JDK9 with Eclipse Oxygen IDE following the approach you detailed.
Here are the details of my installation (under Windows 10):
I downloaded and installed Java jdk-9+181 from http://jdk.java.net/9/
I downloaded and installed Eclipse Oxygen from https://www.eclipse.org/downloads/download.php?file=/oomph/epp/oxygen/R/eclipse-inst-win64.exe
I started Eclipse and attempted to add JRE9 (Windows -> Preferences -> Java -> Installed JREs -> Add...)
I got the error reported in the OP ("Target is not a JDK root...").
I then installed Java 9 Support (BETA) for Oxygen as detailed here: https://marketplace.eclipse.org/content/java-9-support-beta-oxygen
I restarted Eclipse and tried to add JRE 9 again. This time it worked fine:
Also, see https://wiki.eclipse.org/Java9/Examples for further details.

I'm also faced this issue "Target is not a JDK root. System Library was not found" for Java 11 and I have done some workaround and got to know, this is related to the version we are using either eclipse or sprint tool suite. So i figured out the correct version and posted below.
Java 9 Supports:
Spring Tool Suite:3.9.0
Eclipse:Oxygen (4.7)
Java 10 Supports:
Spring Tool Suite:3.9.4
Eclipse: Oxygen (4.7.3) and Above
Java 11 Supports:
Spring Tool Suite: 3.9.7
Eclipse: Photon 4.8, 4.10 (officially supports)
Below are references i used:
STS
Eclipse
Click Up Vote if this is useful for you.

This looks like Eclipse bug 494481.
Unfortunately there is currently no fix or workaround listed for the bug.

You should use Standard VM not standard 1.1x VM
best regards!
se pic

set the path to:: /Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home

Oxygen does not come with java9 support. You need to install the eclipse Java9 support patch from the market place https://marketplace.eclipse.org/content/java-9-support-beta-oxygen to be able to use Java9 or you can update from "Help" menu bar.
Ref - https://bugs.eclipse.org/bugs/show_bug.cgi?id=509704

I was facing the same problem for the latest JDK."jdk-18_windows-x64_bin.exe"
However it is resolved by installing
this eclipse
https://www.eclipse.org/downloads/download.php?file=/oomph/epp/oxygen/R/eclipse-inst-win64.exe.
Give it a try, I hope this will work for you too!
Cheers!