B4J Tutorial Running Jar with double click (in Java OpenJDK 11+ )

As shared in multiple places in this forum Java 11 OpenJDK does not allow to run jar files directly. (here)

Here is an easy workaround...

1. Run cmd with administrator privilege.
2. Type the following two commands:

ftype JARFile="c:\java\bin\javaw.exe" -jar --module-path c:\java\javafx\lib --add-modules javafx.controls "%1" %*"

assoc .jar=JARFile

Replace the path "c:\java\bin\javaw.exe" and "c:\java\javafx\lib" based on your installed java folder.

UPDATE 16/03/2023:

If you have OpenJDK version greater than 11 and you are still unable to run a GUI based jar then try edit in Registry
1. Navigate to Computer\HKEY_CLASSES_ROOT\JARFile\Shell\Open\Command
2. In Default put this value (replace path with your java and javafx lib path) :

"c:\java\bin\javaw.exe" -jar --add-opens javafx.controls/com.sun.javafx.scene.control.skin=ALL-UNNAMED --module-path c:\java\javafx\lib --add-modules javafx.controls,javafx.web "%1" %*

Cheers!

 

[LucaMs]

(The browser finally worked!)

If you see Java Help, the variables are correct and you can follow the steps from the beginning of this thread.

 

[Mark Stuart]

C:\Users\Mark>ftype JARFile="c:\java\jdk-19.0.2\bin\javaw.exe" -jar --module-path c:\java\jdk-19.0.2\javafx\lib --add-modules javafx.controls "%1" %*"

File type 'JARFile' not found or no open command associated with it.

 

[LucaMs]

We're (I'm) screwing up: jdk 19 doesn't have c:\java\javafx\lib

This thread is about

Running Jar with double click (in Java OpenJDK 11+ )​

 

[Mark Stuart]

We're (I'm) screwing up: jdk 19 doesn't have c:\java\javafx\lib

This thread is about

Running Jar with double click (in Java OpenJDK 11+ )​

Mine does. My java folder is a direct reflection of the installation directions from the B4X webpage.

 

[LucaMs]

jdk 19 doesn't have c:\java\javafx\lib

Download and install it:
https://www.oracle.com/java/technologies/install-javafx-sdk.html

 

[LucaMs]

java -?

works (dos window)?

 

[Mark Stuart]

Download and install it:
https://www.oracle.com/java/technologies/install-javafx-sdk.html

I won't do the install as yet. I need confirmation from @Erel to see if this is really required.
After all, the B4X webpage did instruct us to download this: OpenJDK 19 + OpenJFX: download link.
Shouldn't that download contain the JavaFX that the Oracle page has on it?

 

[LucaMs]

I won't do the install as yet. I need confirmation from @Erel to see if this is really required.
After all, the B4X webpage did instruct us to download this: OpenJDK 19 + OpenJFX: download link.
Shouldn't that download contain the JavaFX that the Oracle page has on it?

Your message arrived while I was typing mine. You already have JavaFx, so that's fine.

Mine does

 

[Mark Stuart]

Your message arrived while I was typing mine. You already have JavaFx, so that's fine.

So why don't the ftype commands work in the CMD window?
This shouldn't be that complicated!

 

[LucaMs]

java -?

works (dos window)?

try that

 

[Mark Stuart]

try that

try what?

 

[LucaMs]

open a dos window (with administrator rights) and:

c:\>java -?

enter

you should see the help

 

[Mark Stuart]

I already did that.


C:\Users\Mark>ftype JARFile="c:\java\jdk-19.0.2\bin\javaw.exe" -jar --module-path c:\java\jdk-19.0.2\javafx\lib --add-modules javafx.controls "%1" %*"
File type 'JARFile' not found or no open command associated with it.

 

[LucaMs]

Mark, please, help me... to help you

If you run, inside A DOS window:

java -?
and press Enter,

do you see Java Help in the DOS window?

 

[Mark Stuart]

Mark, please, help me... to help you

If you run, inside A DOS window:

java -?
and press Enter,

do you see Java Help in the DOS window?

Yes. I ran the above command. Didn't you see that?
And I did run java -?
I saw all the command options. I don't know what to do with all that.

 

[LucaMs]

Mark, please, help me... to help you

If you run, inside A DOS window:

java -?
and press Enter,

do you see Java Help in the DOS window?

It seems that b4x.com does not allow a dos window image?!
I can't post it

Trying again...

 

[LucaMs]

I saw all the command options. I don't know what to do with all that.

It was just a test to check if you could run Java from anywhere, i.e. if the system variables are correct.

 

[Mark Stuart]

It was just a test to check if you could run Java from anywhere, i.e. if the system variables are correct.

This is going nowhere. Good nite.

 

[LucaMs]

In the DOS window, try this first:

assoc .jar=JARFile

(+ enter, obviously)

 

[Mark Stuart]

C:\Users\Mark>assoc .jar=JARFILE

Access is denied.
Error occurred while processing: .jar.