Troubleshooting

If you're having issues with Java, VS Code, running your files, or running unit tests, try the steps below and make sure you have everything correct!

Clean Java Workspace

First, try cleaning the Java workspace. This clears your projects and restarts VS Code.

Open the Command Palette with F1 or Ctrl+Shift+P (Cmd+Shift+P on Mac) and search for clean java. You'll want to select the Java: Clean Java Language Server Workspace option:

Next, in the lower-right corner, click Reload and delete:

Common Issues

1. Make sure the CS159 folder is open in VS Code

   • In VS Code, use the top menu to go to File > Open Folder... and then select the CS159 folder that you downloaded in Installing Java, VS Code.

   • You should see a single CS159 folder at the top of the explorer pane:

     

   • There should be four folders underneath, .vscode, bin, lib, and src.

2. Make sure your code is placed in appropriate folders under the src folder

   • Homework must go in individual hw1-hw5 folders
   • Programming assignments must go in individual pa1-pa4 folders

3. Make sure your package statement matches the folder structure

   • e.g., if you have Photo.java in src/pa1/photo, the package msut be be pa1.photo.

   • Usually VS Code automatically inserts this line for you, but if you move files around, it could be incorrect.

4. If you are unable to run a file, make sure that it is something you can run!

   

   • You can't "run" a file that doesn't contain a main method.
   • Don't create a main method unless the assignment asks for it. (Gradescope may not be happy if you do so)
   • Instead, you should be running your unit tests to check if your code works.

5. If you get an error saying that the Update jacoco.xml task failed, or you are unable to display coverage:

   • Please check your Java version and make sure the correct version is installed.