Wsrtjtyk

I built in IntelliJ IDEA my javaFX application as jar file.
Using "Project Structure >> Artifacts >> + JavaFX Application" I can build .app, .dmg, .pkg, .exe with JRE included.
But I need build same files without JRE bundled.
Sure, I can use JAR, but I want to make my own icon and maybe installer.

I also tried to create .app folder from jar to execute it manually "java -jar myJarName.jar" , but if I have several JDK version - it always uses the latest (JRE 11) which not included javaFX library and my .app doesn't work. But if I run the same JAR with Jar Launcher.app it works perfectly. Somehow it chooses the right jre version.
ExcelsiorJet, install4j and similar apps work well, but my project is OpenSource and I can not pay 3000$ for this.

The question is - how can I build MacOs/Windows native launcher app/dmg/pkg/exe without JRE bundled for users who already have JRE installed? Can I use IntelliJ IDEA to build this a way as I built with jre bundled?

Okay, looks like I found some crooked way to do this all.

Windows solution:

To bundle on Windows it's easy to use launch4j (windows only). It's free and there is no problem to create .exe with no Jre bundled.

MacOS solution:

For MacOS it's a bit harder:

1. 
   

   Create myApplication.app folder and design it's structure

   
   
   

   

   
   


2. Write launcher bash script:
   In my case I should detect which versions of Jre installed and choose any between java 1.8 and 10
   

I don't know bash script language and I believe I write it unoptimized way. I would be happy if anyone correct me. Anyway it works the way as I wanted:

#!/bin/sh



# set the working directory

DIR=$(cd "$(dirname "$0")"; pwd) 



# extract first fit java version installed

jre_path=$(/usr/libexec/java_home -V 2>&1 |

while IFS= read -r line

do

    if [[ "$jre_found" ==  "true" ]]; then

        break

    fi

    version=$(echo $line | cut -d ' ' -f 1|sed 's/^ *//;s/ *$//' | cut -d ' ' -f 1 | sed 's/^ *//;s/ *$//')

    major=$(echo $version | cut -d. -f1)

    minor=$(echo $version | cut -d. -f2)

    array=(${line// /}) 

    array_size=${#array[@]}

    let "last_index=array_size-1"

    path=${array[ $last_index ]}



    if [[ $major == 1 ]]; then

        if [[ $minor -gt 7 && $minor -lt 11 ]]; then

            echo $path

            jre_found="true"

        fi

    elif [[ $major -gt 7 &&  $major -lt 11 ]]; then

        echo $path

        jre_found="true"

    fi

done)



# execute our jar file

$jre_path/bin/java -jar "$DIR"/myApp.jar

And now everything should be working from double click on myApplication.app.