Java – eclipse autocomplete does not apply to lambda and types

I use eclipse oxygen 2 Release(4.7.2)

I tried some lambda expressions and encountered the following problems:

I write lambda parameters without type, and eclipse autocomplete works normally:

If I write a lambda parameter with a type, it will not be done automatically:

But I can write this myself and everything is normal:

Is this an error in eclipse? Can anyone explain this behavior?

Solution

Yes, this is a known error in eclipse that has not been fixed: Eclipse bug 460921

Eclipse is open source. Welcome to fix this bug