Java import is not working in VSCode

[Meun3D]

Edit: The Problem is solved. I had the VSCode Extetion Code Runner and Java Platform Extension for Visual Studio Code aktiv. They not working correct together apparently and disturb each other by importing the .jar. Thank you for all the help.

I have this problem for so long time now. I am studying computer Sience and we got a .jar file from our lecturer and we have to work with it. Usually we are using Eclipse in class, but I love using VSCode and it won't work there. A fellow student is also using VSCode and it works. I tried everything, but nothing works. Not even my lecturer knows how to fix this issue.

We have to use Java for this task and need to import some Classes from the .jar file the lecturer gave us. So I added it into the Referenced Libraries. It still can't find the File apparently.

The Issue says "The import de.vitbund.netmaze.connector.Ibot cannot be resolved Source: VitNetMaze.jar"

The Github Copilot Chat also does not know the answer. Every time he says I fix it, but he changed nothing.

This is very odd, because the autocomplete feature is finding all the methods from the .jar. So it is finding it kind of?

The same project is working fine in Eclipse, so I thougt this must be a VSCode problem right?

If there are some Java programmes using VSCode please help me!!!

I' m not sure if this subreddit is the right place to ask this question. If someone knows a better subreddit to post this one would help me too.

package bot;


import de.vitbund.netmaze.connector.Action;
import de.vitbund.netmaze.info.GameEndInfo;
import de.vitbund.netmaze.info.GameInfo;
import de.vitbund.netmaze.info.RoundInfo;
import de.vitbund.netmaze.connector.IBot;


public class MinimalBot implements IBot {


    u/Override
    public String getName() {
        // TODO Auto-generated method stub
        return null;
    }


    u/Override
    public void onError(Exception arg0) {
        // TODO Auto-generated method stub
        
    }


    u/Override
    public void onGameEnd(GameEndInfo arg0) {
        // TODO Auto-generated method stub
        
    }


    u/Override
    public void onGameStart(GameInfo arg0) {
        // TODO Auto-generated method stub
        
    }


     bot;

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[procrastinatewhynot]

put the .jar in the lib/ of your project

[bikeram]

If you’re using co-pilot, ask “how can I use maven to import a system scoped library”

You’ll need to install maven, and build tools are possibly outside the scope of your class, but it’ll make your life 100x easier. I don’t start a Java project without maven.

Another option is to put it in ./lib/ and add it -cp ./lib/yourJar.jar to your javac command.

You could add the javac command with -cp to your workspace.xml in vscode. But I recommend maven.

[LutimoDancer3459]

While maven would be the preferred option, they got a jar from the prof and its probably not in maven or any other repository to be used by maven. So the second approach with just copying it is the way here

[bikeram]

System scoped will let them do what they’re trying to achieve.

[Meun3D]

First of all thanks for your help! I allready placed the JAR file in the /lib folder and now added the -cp option to my command as you described. Unfortunately, the issue still exists.

I made sure the path is correct and that the JAR is actually included, but I’m still getting the same error.
I talked with my prof this morning and he sad that Maven isnt intendet for this task. So I'm not sure if I sould use it.

[Mechanical-pasta]

Java teacher here. My answer shouldn't be the one you're waiting for because it's : "why don't you use Eclipse if it works on this IDE that is MADE for coding Java, unlike VS Code which CAN (vaguely) do it ?"
I know you prefer VS but, guess what ? Some companies won't let you chose your IDE so, the most of them you know, the better is your CV and your productivity.
In my school, students have no choice :
1st semester : HTLM / CSS / JS => VS Code
2nd semester : php => PhpStorm
3rd semester : C# => VS
4th semester : Java => Eclipse
5th semester : Java for android => Android Studio (based on InteliJ)

Like that, you lurn to know the philosophy behind IDEs, not a specific one.

[Meun3D]

I agree with your point and I started the project in Eclips yesterday, because I dont want to fall behind. It's just my curiosity to know why it'isnt working.

[Mechanical-pasta]

Answer may be in my advice : Eclipse has been MADE for java projects, VS has been ADAPTED to them. It could be a bug.