Cannot run/compile java program with VSCode

Question

When i am hitting f5 i get this text in debug window

Error: LinkageError occurred while loading main class Hello
    java.lang.UnsupportedClassVersionError: Hello (class file version 52.65535) was compiled with preview features that are unsupported. This version of the Java Runtime only recognizes preview features for class file version 56.65535

javac -version shows

javac 12

java -version

openjdk version "12" 2019-03-19
OpenJDK Runtime Environment AdoptOpenJDK (build 12+33)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 12+33, mixed mode, sharing)

Code that i am trying to compile

public class Hello {
    public static void main(String[] agrs)
    {
        System.out.println("Hello world!");
    }
}

PATH,JAVA_HOME and JRE_HOME are set properly. Debug add-on installed. I can compile and run the same code in InteliJ IDEA or using java (file), javac (file) and it will work fine but i don't know why it does not work on vscode.

What package are you using in VSCode to debug your java code? — Dylan Riley
– Dylan Riley, Commented Apr 4, 2019 at 21:10
Also you made a typo in your text. You said String[] agrs when you meant to type String[] args — Dylan Riley
– Dylan Riley, Commented Apr 4, 2019 at 21:11
Seems like a bug in the debugger extension. Very similar Q a few days ago: stackoverflow.com/q/55443351 (doesn't seem to be a dupe though, as the error messages are different) You could also try updating the extension. — Jorn Vernee
– Jorn Vernee, Commented Apr 4, 2019 at 21:14

Community · Accepted Answer · 2020-06-20 09:12:55Z

3

@JornVernee send link to other question, it helped Link to question

summary:

make sure uninstall jdk8 clean

install jdk11

add "vmArgs": "--enable-preview" in launch.json

F1, "Java: Clean ……" and "Java: Force ……"

run standalone file again

edited Jun 20, 2020 at 9:12

CommunityBot

11 silver badge

answered Apr 4, 2019 at 21:24

Kurisu

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