I realise this is an old post but I have recently had this issue in a corporate environment when using MS EMET 5.2 and it was because DEP was enabled in EMET. Removing the tick from DEP in the EMET GUI returned the Java control panel.

Answer from Smeefa on Stack Exchange
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Oracle
java.com › en › download › help › enable_panel.html
How do I enable Java through the Control Panel?
CAUSE The Java content in the browser is disabled in the Java Control Panel. If Java is already installed but applets do not work, you may need to check and see if Java is enabled.,
Discussions

Java not opening in Control panel
Java is not opening in Control panel since long. I tried all the procedures mentioned in this forum. but still not able to open it. Because of this, all application associated with it are also not working. Mine is windows 11, 64 bit operating system? Any… More on learn.microsoft.com
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June 26, 2022
Having trouble opening the java control panel
System Properties (Windows 7) -> Apps -> Java or just use VM arguments when running your program More on reddit.com
🌐 r/javahelp
2
2
February 20, 2022
"Reopen the Java Control Panel" doesn't do anything - Ask Different
I'd at least try a reboot to test, & check for Java Control Panel in Activity Monitor. ... I'm getting the same thing. And when I try to reinstall it, the Java installer just bounces a few times and never opens a window. Never starts, unable to reinstall it. I created another profile/account and used it after switching - and the apps that had been failing to start - never use any CPU - would work like they were supposed to. By now it's pretty obvious something is not ... More on apple.stackexchange.com
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Java Control Panel doesn't load in OS X Y… - Apple Community
I would like to change my security preferences for some Java applets' websites. I thus went to System Preferences > Java. A window popped up saying it was going to open the Java Control Panel in a separate window. A new icon with the Java symbol opened in the dock, presumably trying to open ... More on discussions.apple.com
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December 8, 2015
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Windows Report
windowsreport.com › windows 11 › how to › java application not found in control panel [fix]
Java Application Not Found in Control Panel [Fix]
October 4, 2023 - Click on the Java icon to open the Java Control Panel. Navigate to the Security tab and select Enable Java content for browser and Web Start applications. Press Apply and then OK to apply the changes and exit.
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Oracle
java.com › en › download › help › win_controlpanel.html
Where is the Java Control Panel on Windows?
In the Windows Control Panel, click on Programs. Click on the Java icon to open the Java Control Panel.
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Oracle
docs.oracle.com › javase › 7 › docs › technotes › guides › jweb › jcp › jcp.html
Java Control Panel
On Microsoft Windows, if both the 32-bit and 64-bit versions of Java are installed, this panel is not available. In this event, you have to launch the Java Control Panel directly from the 32-bit directory command line (C:\Program Files (x86)\Java\jre7\bin\javacpl.exe).
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SolVPS Hosting Blog
solvps.com › blog
Open Java Control Panel Settings from CMD (Windows) | SolVPS Hosting Blog
August 30, 2017 - As a a workaround, or if you need to launch the Java Control Panel from a script or for other reasons, follow the steps below. ... If the path is not found, navigate manually to c:\Program Files (x86)\Java\ and find the .exe within the version folder you have installed.
Find elsewhere
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Reddit
reddit.com › r/javahelp › having trouble opening the java control panel
r/javahelp on Reddit: Having trouble opening the java control panel
February 20, 2022 -

I'm trying to open the java control panel from the windows control panel. I'm trying to make it to where java is allowed to use more than 2048mb of my ram so it can run better. My problem is when I open the control panel I can't find the java applet to open it. even if I try to search java on the windows search bar it doesn't come up. It's as if I don't even have java installed. The only place it shows up is when I go into settings and look at my apps it says I have it installed. I've tried redownloading it and tried to open the control panel via the windows terminal but that didn't work either, It just says "Could not open virtual machine".

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System Properties (Windows 7) -> Apps -> Java or just use VM arguments when running your program
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Apple Community
discussions.apple.com › thread › 6620105
Java Control Panel doesn't load in OS X Y… - Apple Community
December 8, 2015 - Anyway, to fix it (temporarily) just change Mac region settings to USA (I was on Serbia), and Java Control Panel opens normally.
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Blogger
sumeetsharma84.blogspot.com › 2013 › 01 › java-control-panel-icon-application-not.html
Java Control Panel Icon "Application Not Found"
January 7, 2013 - If you still cannot find the key, do not continue with the rest of this article. Test the results: Close and re-open the Windows Control Panel. The 'generic' Java icon should be replaced with a properly-formed Java icon and the control panel icon should behave properly.
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Here's a solution that worked for me:

  1. Open a new finder window and navigate to /Library/Internet Plug-Ins/. There you will find a file named JavaAppletPlugin.plugin.
  2. Control + Click this file and choose Show Package Contents from the contextual menu.
  3. Inside the package, navigate to /Contents/Home/bin/.
  4. Double click the ControlPanel file to display the Java Control Panel. Change any settings as you wish and then save it.
  5. From now on, the panel will be available as always from “Apple” menu > System Preferences...

Note: if you don't find the JavaAppletPlugin.plugin file inside the /Library/Internet Plug-Ins/ folder, open the Terminal.app and create a symlink from the original:

sudo ln -s /System/Library/Java/Support/CoreDeploy.bundle/Contents/JavaAppletPlugin.plugin /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin

Reference

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They removed Java Control Panel in Java 11.

Open this release notes Removal of Java Deployment Technologies, it says

The Java Plugin and Java WebStart technologies that were deprecated in JDK 9 and marked as candidates for removal in JDK 10 have now been removed. Please note that the Java Control Panel, which was used for configuring the deployment technologies, has also been removed along with the shared system JRE (but not the server JRE) and the JRE Auto-Update mechanism. More details are available in this white paper.

Also, If you go through this web page, JDK 11 Is Released!

There is the last bullet point where it says

The deployment stack, required for Applets and Web Start Applications has been removed. This includes the Java Control Panel used for configuring the deployment technologies, the shared system JRE (but not the server JRE), and the JRE Auto-Update mechanism.

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Doscrowd
doscrowd.com › home › english › best way to fix issues with opening java icons control panel
Best Way To Fix Issues With Opening Java Icons Control Panel – Dos Crowd
February 26, 2022 - Important, so look for the use of a partial path, not the actual name. Example, Click the “Start” button, and then simply select “Control Panel”. In the Control Panel search, type Java Control Panel. Click the Java icon to open the current Java Control Panel.
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Java is present in Windows 10 as a complement to run various applications or to access websites. This is why if we don't have Java, many multimedia elements simply won't open as they should. Java integrates a control panel for its management, this is composed of the following options: ·   · Java Features · General: there it is possible to know the version of Java used, configure the network or access the temporary files · Update: from this tab we can configure the notifications of available Java updates · Java - Manage runtime settings and settings · Security: in this section it is possible to activate the Java content, adjust the security parameters or add exceptions · Advanced: Here we can activate or not the general Java parameters · There are different methods to access the Java Control Panel and TechnoWikis will explain each of them so that you can access the different Java options and configure it however you want.. · To stay up to date, remember to subscribe to our YouTube channel!   SUBSCRIBE · 1. Open Java Control Panel from Windows 10 Control Panel · He passed · For this method we open the Control Panel and in the "View by" field we set "small icons": · Step 2 · Then we click on the "Java" line to open its Control Panel: · 2 . Open Java Control Panel from CMD Windows 10 · We access the command prompt console and there we execute. Pressing Enter will open the Control Panel. · javaws -viewer · 3 . Open Java Control Panel from PowerShell Windows 10 · The modern PowerShell console is another option to access this Java panel, for this we open PowerShell and run. Pressing Enter will open the Java Control Panel. · 4. Open Java Control Panel from Run Windows 10 · Step 1 · To open Run it is possible: ·  Run · In Execute we enter. We click OK to go to the Java Panel. · 5 . Open Java Control Panel from Windows 10 Finder · We go to the Start search engine and enter "configure", select "Configure Java": · We click and the panel will open: · With these options you have the best alternatives to access the Java Control Panel in Windows 10.
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LinuxQuestions.org
linuxquestions.org › questions › programming-9 › unable-to-open-java-control-panel-inspite-of-having-java-installed-4175736249
Unable to open Java Control Panel, inspite of having Java installed.
April 20, 2024 - Have java installed, and on using the command: Code: javaws -viewer , am unable to open the Java Control Panel; inspite of the command able to open
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Hi,

  1. Are you referring to the Java Control Panel?
  2. Have you made any changes to the computer, prior to the issue?

Method 1:

Run a virus scan on your computer and check.

http://www.microsoft.com/security/scanner/en-us/default.aspx

Note: The Microsoft Safety Scanner expires 10 days after being downloaded. To rerun a scan with the latest anti-malware definitions, download and run the Microsoft Safety Scanner again.

Note: Any data that is infected may only be cleaned by deleting it, which means there is a potential for data loss.

Method 2:

Step 1: To fix this problem, you need to know the name of the executable that drives the Java Control Panel.

a. In the Control Panel, right click on the failed icon and click "Create Shortcut".

b. Locate the new Desktop icon, right click on it and choose "Properties".

c. Discover the actual path by clicking "Change Icon".

Note: If the underlying executable is corrupted or missing, the displayed error message will show the actual path. For example, the Java Control Panel reports "Windows can't find the file C:\Program Files\Java\JRE6\bin\javacpl.exe".

Make a note of the path and filename. Use this to find the registry value in the next step.

Step 2: Removing the Control Panel Icon.

Important: This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

322756 How to back up and restore the registry in Windows

a. Click on Start, type in regedit and hit enter.

b. Position the cursor at the top of the Registry tree.

c. Press Ctrl+F (find) simultaneously and search for the executable's name. When searching, use a partial path, not the full name.

For example, the actual (fully-qualified path name is: C:\Program Files\Java\JRE6\bin\javacpl.exe). In this case, search for this:

"\bin\javacpl.exe" (no quotes)

d. For the Java Control Panel, expect to find this registry key GUID. Be sure this key is within "HKEY_Classes_Root\CSLID" and not in another location in the registry:

HKEY_Classes_Root\CLSID{4299124F-F2C3-41b4-9C73-9236B2AD0E8F}

e. Confirm by opening the key; you will see javacpl.exe lurking within.

f. Delete the top-folder {4299124f...E8F} and all items within.

g. Do not delete the CSLID folder.

h. Close registry editor.

i. Reboot the computer and check for the issue.

Hope this helps.

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Hello,

I am having the same problem as you have. But for me the error, of whatever to call it (im 14 years old), it says 'Explorer.EXE' Is that the thing I have to search for...?