How to add JVM arguments for Spring Boot project in VS Code?

Question

I'm trying out VS Code by moving a project I did on Eclipse to it. I had a run configuration in Eclipse for this project which had the following JVM arguments:

--module-path lib/javafx-sdk-13/lib --add-modules=javafx.controls

Of course this "lib" folder and its contents followed to the new VS Code project folder but I don't know where to put those JVM arguments in vsCode, the equivalent of the run configurations with Eclipse essentially. I tried putting them in the args section of the launch.json file with no success.

I am using the spring boot dashboard to launch the project if that makes a difference.

Here is my launch.json:

{
"configurations": [
    {
        "type": "java",
        "name": "Spring Boot-BudgetApplication<budget>",
        "request": "launch",
        "cwd": "${workspaceFolder}",
        "console": "internalConsole",
        "mainClass": "com.someone.budget.BudgetApplication",
        "projectName": "budget",
        "args": ["--module-path","lib/javafx-sdk-13/lib","--add-modules=javafx.controls"]
    }
]

}

Peshawar

Even just running the main method without the spring boot dashboard does not work. – Peshawar

-DARG_NAME=ARG_VALUE I.e.: -Dhttp.proxy="myproxy.url" – Contortionist

is that not just for Spring properties? Not sure how that would translate to JVM arguments to point to the JavaFX files and add the controls module? – Peshawar

JVM Args are quite simple --ARG is destinated to the Jar you run, -DargName is an JVM Argument. Keep in mind, your code (your jar) can access the JVM Args. – Contortionist

is this the right syntax? "args": "-D--module-path lib/javafx-sdk-13/lib --add-modules=javafx.controls" – Peshawar

Nop -Dmodule-path=lib/javafx-sdk-13/lib -Dadd-modules=javafx.controls maybe --Dmodule-path=lib/javafx-sdk-13/lib --Dadd-modules=javafx.controls – Contortionist

none of those work – Peshawar

No, --module-path is a regular argument of the Java command. Whatever is passed to -D becomes a system property. There is a whole lot of miscommunication going on here and a whole lot of guess work. I think the arguments deal is a big red herring, isn't this a more generic "How do I get stuff to run using the Spring Boot Dashboard VSC plugin" ? If so... you must be getting an error of some kind, so share it. – Hoahoactzin

Does it work if you just run the app outside of VSCode ? – Contortionist

"Error: JavaFX runtime components are missing, and are required to run this application". Typical "I don't know where the libs are" error. – Peshawar

this app works perfectly in eclipse because i can just add those arguments in the run configuration's JVM arguments – Peshawar

Ok, so your problem is into the VSCode plugin. – Contortionist

It is not, as I get the same issue just running the main method normally without the plugin. Again, I just need to know how to pass JVM arguments to a Java app with vsCode. If it can at least run I'll worry about the spring boot dashboard plugin later. – Peshawar

Answer 1

The solution was placing the args in the vmArgs section like so :

"vmArgs": "--module-path=lib/javafx-sdk-13/lib --add-modules=javafx.controls"

Peshawar

This works with the spring boot dashboard plugin as well btw. – Peshawar

Could you please add steps Where to add this? – Pashalik

@MehrajMalik In the project's launch.json – Bishopric

beware if your vmargs is a long string, you cannot break into multiple lines as json specs dont allow. Just use the long single line. – Cranford

Answer 2

Just add it in the launch.json file.

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "java",
            "name": "Application",
            "request": "launch",
            "mainClass": "mypackage.Application",
            "projectName": "myproject",
            "vmArgs": "-Darg1=60000 -Darg2=120000"
        }
    ],
}

Consensual

Answer 3

I know this question was for springboot, but wanted to add for standalone java apps, you can just add args to launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "java",
            "name": "Application",
            "request": "launch",
            "mainClass": "mypackage.Application",
            "projectName": "myproject",
            "args": ["60000","120000"]
        }
    ],
}

Seeseebeck