VSCode lacks many of IntelliJ's features so it would act as a text-editor with naive auto-complete better. With plugins and presumably an LSP link, you can get some degree of functionality but it does not compare in total.

I would not write Java anywhere but IntelliJ. Any long time IntelliJ+Java user has macros and templates written so that boilerplate is automatic. `psvm` is built-in, as is `sout`, but when I wrote a lot of Java I had ones for other common patterns at my workplace.