Java won't work

[hopner]

Type: Bug

After restarting vscode on my mac today, all of my maven projects are unable to compile and run.

VS Code version: Code 1.82.0 (8b617bd, 2023-09-06T22:08:29.670Z)
OS version: Darwin arm64 22.4.0
Modes:

System Info

Item	Value
CPUs	Apple M1 (8 x 24)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled
Load (avg)	3, 4, 3
Memory (System)	8.00GB (0.08GB free)
Process Argv	--crash-reporter-id e5c99e0e-6ff2-48dd-8fd0-40a8b35b92ff
Screen Reader	no
VM	0%

Extensions (45)

Extension	Author (truncated)	Version
better-comments	aar	3.0.2
composer-php-vscode	DEV	1.38.13826
phptools-vscode	DEV	1.38.13826
profiler-php-vscode	DEV	1.38.13826
githistory	don	0.6.20
gitlens	eam	14.3.0
copilot	Git	1.111.404
copilot-chat	Git	0.7.2023090101
todo-tree	Gru	0.0.226
haskell	has	2.4.1
output-colorizer	IBM	0.1.2
latex-workshop	Jam	9.13.4
vscode-peacock	joh	4.2.2
language-haskell	jus	3.6.0
vscode-colorize	kam	0.11.1
vscode-latex	mat	1.2.0
python	ms-	2023.16.0
vscode-pylance	ms-	2023.9.10
jupyter	ms-	2023.8.1002501831
jupyter-keymap	ms-	1.1.2
jupyter-renderers	ms-	1.0.17
vscode-jupyter-cell-tags	ms-	0.1.8
vscode-jupyter-slideshow	ms-	0.1.5
cmake-tools	ms-	1.15.31
cpptools	ms-	1.17.5
cpptools-extension-pack	ms-	1.3.0
latex-formatter	nic	1.0.5
polacode	pnp	0.3.4
java	red	1.22.0
LiveServer	rit	5.7.9
markdown-preview-enhanced	shd	0.7.3
code-spell-checker	str	3.0.1
code-spell-checker-norwegian-bokmal	str	0.2.0
latex-utilities	tec	0.4.10
cmake	twx	0.0.17
intellicode-api-usage-examples	Vis	0.2.8
vscodeintellicode	Vis	1.2.30
vscode-java-debug	vsc	0.54.0
vscode-java-dependency	vsc	0.23.1
vscode-java-pack	vsc	0.25.12
vscode-java-test	vsc	0.39.1
vscode-maven	vsc	0.42.0
vscode-icons	vsc	12.5.0
gitblame	wad	10.5.0
vscode-import-cost	wix	3.3.0

(1 theme extensions excluded)

A/B Experiments

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python383cf:30185419
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pythontb:30283811
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pythonptprofiler:30281270
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pythonvs932:30410667
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vsclangdc:30486549
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pynewext54:30695312
azure-dev_surveyone:30548225
vscccc:30803845
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showlangstatbar:30737416
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pythonfmttext:30731395
fixshowwlkth:30771522
showindicator:30805244
pythongtdpath:30769146
i26e3531:30792625
pythonnosmt12:30797651
pythonidxptcf:30805731
pythonnoceb:30805159
dsvsc013:30795093
dsvsc014:30804076
diffeditorv2:30821572
dsvsc015cf:30829746

[vscodenpa]

Thanks for creating this issue! It looks like you may be using an old version of VS Code, the latest stable release is 1.82.1. Please try upgrading to the latest version and checking whether this issue remains.

Happy Coding!

[hopner]

Issue remains after updating:

Error: Unable to initialize main class
Caused by: java.lang.NoClassDefFoundError: List

[flosardo]

Same issue with the latest VS Code version 1.82.
Update 13 sept: A possible fix could be adding JAVA_HOME to your path(if it's not already there) and restart VS Code as suggested in the following stackoverflow answer. It worked for me.
https://stackoverflow.com/questions/77092008/why-is-my-build-path-suddenly-incomplete-for-my-java-project-in-visual-studio-co?noredirect=1&lq=1
However, it still remains a mystery why all of a sudden this happened

[starball5]

See redhat-developer/vscode-java#3287.

Related on Stack Overflow: Why is my build path suddenly incomplete for my java project in VS Code?, where I have written up an answer post.

[roblourens]

Please file this on the Java extension repo, thanks