Autocompletion with unimported types

[anthonyvdotbe]

When trying to invoke a static/instance method on an unimported type, VS Code should be more helpful.

Environment

• Operating System: Windows_NT x64 10.0.18362
• JDK version: openjdk full version "13.0.1+9"
• Visual Studio Code version: 1.39.2 (user setup)
• Java extension version: 0.52.0

Steps To Reproduce

Consider the code snippets below. When invoking code completion after the dot, I'd expect VS Code to help me somehow, e.g. by proposing all possible completions of all applicable types it knows of. Or by proposing to import the unknown types.

class Foo {
    void foo() {
        IntStream.
    }
}

class Foo {
    void foo() {
        new ArrayList().
    }
}

Current Result

For the first example, I need to first type something like IntStream i;, then trigger imports, then go back to IntStream. to trigger autocompletion.

Expected Result

I'd expect VS Code to help me somehow, e.g. by proposing all possible completions of all applicable types it knows of. Or by proposing to import the missing types.

Additional Informations

For comparison, when invoking the samples above in Apache NetBeans 11.0, I get the following:

[fbricon]

That's an interesting feature, but we might be limited by JDT's capabilities. @snjeza can you please investigate whether this needs fixing upstream JDT or if it's doable from jdt.ls?

[snjeza]

Eclipse works the same way.

[mickaelistria]

Eclipse works the same way.

Can you please report the issue upstream in JDT then?

[snjeza]

The following works in VS Code >= 1.23.0

void foo() {
    IntStream.|
}

[snjeza]

Can you please report the issue upstream in JDT then?

@mickaelistria You may want to take a look at eclipse-jdt/eclipse.jdt.core#1502

[mickaelistria]

thank you

[snjeza]

The issue can be reproduced in Oracle Java Platform Support

[snjeza]

I have tried Netbeans 19 and IntelliJ IDEA 2022.2.5. They work like eclipse

Netbeans 19

IntelliJ IDEA 2022.2.5- (works with enabled enable Add unambiguous imports on the fly

cc @fbricon @mickaelistria @anthonyvdotbe

[anthonyvdotbe]

For NetBeans: yes, ArrayList broke somewhere between 11 and 19; IntStream still works.
For IntelliJ: enable Add unambiguous imports on the fly.

[snjeza]

IntStream still works.

It works in Eclipse/VS Code, too

[snjeza]

For IntelliJ: enable Add unambiguous imports on the fly.

+1

[rgrunber]

Just tried this out in our pre-releases, since the fix was merged upstream (thanks to @snjeza ), and it seems we've picked it up as well now :

Marking as closed for now.