I just downloaded package from blogspot page: jdkmon_17.0.18-1_amd64.deb and installed it.

When i run it from launcher nothing happens. When i run it from cmd i get this:

petr@probook:/opt/jdkmon/bin$ ./JDKMon 
Feb 03, 2022 10:28:29 AM com.sun.javafx.application.PlatformImpl startup
WARNING: Unsupported JavaFX configuration: classes were loaded from 'unnamed module @6aaf2814'

My system:

petr@probook 
------------ 
OS: Linux Mint 20.3 x86_64 
Host: HP ProBook 450 G8 Notebook PC 
Kernel: 5.13.0-28-generic 
Uptime: 12 mins 
Packages: 2621 (dpkg) 
Shell: bash 5.0.17 
Resolution: 1920x1080, 1920x1080, 1920x1080 
DE: Cinnamon 
WM: Mutter (Muffin) 
WM Theme: Mint-Y-Dark (Mint-Y) 
Theme: Mint-Y [GTK2/3] 
Icons: Mint-Y [GTK2/3] 
Terminal: gnome-terminal 
CPU: 11th Gen Intel i7-1165G7 (8) @ 4.700GHz 
GPU: Intel Device 9a49 
Memory: 3651MiB / 31790MiB 

Default java:

openjdk 11.0.13 2021-10-19
OpenJDK Runtime Environment (build 11.0.13+8-Ubuntu-0ubuntu1.20.04)
OpenJDK 64-Bit Server VM (build 11.0.13+8-Ubuntu-0ubuntu1.20.04, mixed mode, sharing)

Thanks for your help.

After click on download JDK distro is dialog "JDKMon Download Info" (and this dalog has focus) shown under "main window" JDK Mon (this window is always on top). For me was whole dialog "JDKMon Download Info" under "main window" JDK Mon - this is not very user firendly. May be related with fix for issue #24.

My OS is Windows 10.

For not directly downloadable JDK distros (tooltip is now with "No direct download, please check website") would be nice has feature(s) copy URL of web site/open web site for given JDK distro in default browser.

Status now (only):

After installing (windows, msi installer) nothing happens. User expectation is usually that the app is launched or at the very least have an app shortcut available somewhere (meny and or desktop). Now you have to open an file explorer, go to c:\program files\jdk mon and launch it yourself. No launcher shortcut in the menu or desktop.

its a bit of a treasure hunt to find the download jdk window if you have already openeded it once.

currently I have to restart JDKMon after having moved a window in front - its faster than trying to find it :)

would be great if jdkmon would bring windows/dialogs to the front when invoked via menu.

I would use this text "* Marks currently selected JDK (in JAVA_HOME)" somewhere in window (or You have better idea?). I think it would be useful.

First of all, nice utility, when I first saw it I didn't think I'd have much use since sdkman kind of handles updates but then I realized I use Windows at work so this will be handy.

I wanted to be able to clean up some old distros so wanted a way to get to the install folder.

This kind of interferes with the context menu, not sure why, I'm still am not much of an javafx expert.

Also bonus typo fix.

Suggestion to add more default search paths now that multiple can be added. For example: C:\Program Files\Zulu on windows, but there are certainly more, for adopt open jdk etc.

On windows, using the msi-installer, the version is always 16.0.0 so a new version can't be installed unless removed first. Tried to upgrade from 3.6 to 3.7 and wasn't allowed.

Version for msi 16.0.0:

exe:

As explained in this issue, the Oracle JDK installers for Windows (and possibly for macOS too) now shims only 4 binaries in a folder called java_home and uses such directory as the bin that is appended to PATH.

An interesting feature for JDKMon is to offer the user an option to clean PATH and JAVA_HOME, and then allow the user to select which JDK they actually want, and then shim the binaries, append the folder containing the shims in PATH, and point JAVA_HOME to that particular JDK only.

This would potentially take JDKMon to the next level as a cross-platform JDK Switcher.

Hi. Thanks for this application.

I'm using Manjaro Linux and I've hit on some weird edge case: running the application with java -jar JDKMon-linux.jar nothing happens. However, when I run with GTK2, it works just fine: java -Djdk.gtk.version=2 -jar JDKMon-linux.jar

I'd like to suggest adding this property in the ReadMe, in case someone tries to run your application and have the same issue.

When started, it takes tens of seconds, almost a minute, to show a window. On a 3960X 24-core Threadripper with 64G RAM and Nvidia 2070 SUPER.

This window, however, is unresponsive to clicks. I managed to get one right-click out of it among several tries (and showing a context menu), but it usually only started to seize the mouse for the whole desktop. After trying to start it from the command-line, this is printed out:

Sep 09, 2022 4:40:07 PM com.sun.javafx.application.PlatformImpl startup
WARNING: Unsupported JavaFX configuration: classes were loaded from 'unnamed module @2dd61f5b'

(JDKMon:815907): Gdk-WARNING **: 16:40:26.926: XSetErrorHandler() called with a GDK error trap pushed. Don't do that.

Ctrl-C wasn't working in the terminal and no mouse input was possible anymore. One pkill later the window died, leaving an "empty" window shell behind, including a defunct systemtray icon. Still no mouse on the whole desktop. After switching to console (away from GUI Desktop altogether), a kill -9 finally ended the misery.

The window that showed up did look pretty, though. Quite a pleasant surprise.

It seems to come with it's own Java runtime, right? Haven't tried to run it with one of the installed, known good ones though.

I was thinking about using JavaFX for internal GUI projects, but yeah, that was a kind of cold shower right there and then. Yet I still like the looks of JDKMon. ;)

As explained in this issue, the Oracle JDK installers for Windows (and possibly for macOS too) now shims only 4 binaries in a folder called java_home and uses such directory as the bin that is appended to PATH.

An interesting feature for JDKMon is to offer the user an option to clean PATH and JAVA_HOME, and then allow the user to select which JDK they actually want, and then shim the binaries, append the folder containing the shims in PATH, and point JAVA_HOME to that particular JDK only.

This would potentially take JDKMon to the next level as a cross-platform JDK Switcher.

This problem is ONLY in this case (my OS is Windows 10, version JDKMon is 17.0.0.0):

1. 2x click on shortcut "JDKMon" on desktop for launch JDKMon
2. close the window "JDK Mon" or leave it open (does not affect the issue)
3. on tray icon for JDKMon from context menu (right click) to select item "Download a JDK"
4. in opened dialog "Download a JDK" on top is missing text "Bundled with FX" for given checkbox <- issue (see screenshot bellow)

Important note: after close dialog "Download a JDK" and next open the given dialog this issue does not exist next already

Screenshot (for typo "Operatingsystem I send PR already"):