I work "unofficially" on Java code because the Swift code I'm officially responsible for executes Java code (via HTTP request). I'm "not licensed" to use real Java IDEs.
Visual Studio Code's Java support is not great and I do not have jump to definition. Find " name_of_function(" in files is good enough and catches a few useful cases outside Java's understanding, particularly when you have naming consistency throughout a codebase.
Code's not as good as Emacs, but it's reliability installed on nearly every developer's machine regardless of discipline or at least the subset who are willing to ask for help when they encounter problems.
Given that VSCode Java support is being done by Microsoft and Red-Hat together, I wonder how come it isn't working for you.
Do people think it is still the case for large code bases and Java? I find the ability to quickly jump to definition in the IDE a huge help when on boarding into a new codebase.