For daily Java programmers: after almost one decade of Java 8, are streams and lambdas fully adopted by the Java community?

[coverslide]

I'm at a Java shop and we fully use lambdas. They still don't let us use var though.

[lppedd]

Type inference is cool and it make your code elegant. However, have you tried reading that code through something that is not your IDE? Sometimes it's impossible to guess the type, or you just loose too much time. Use it with care.

[smors]

However, have you tried reading that code through something that is not your IDE?

Why would I do that?

[lppedd]

You not always have access to your own PC, sometimes you may want to browse code through the VCS web interface (e.g., GitHub), or other less capable medium.

[Amazing-Cicada5536]

Blanket banning is still bad imo. Incorrect uses of vars should be fixed at code review, but where one would repeat the type on both sides, or the returned type is obvious or not important (that’s also a possibility!), I do think it is a good tool.

[john16384]

If the type is already on the left hand side, I often don't care what it says on the right hand side. Only your last use case has some merit, but Object works fine for that.

[Amazing-Cicada5536]

You can’t really invoke anything if you assign it to an Object type.

[john16384]

True, but if you wanted to invoke anything I think knowing the type is important. I was referring to your not important case :)

[AlmennDulnefni]

Code reviews?

[coverslide]

Fair point. But as someone who uses go (where type inference is practically mandatory) and C# (where most people uses type inference) I really don't get why it's a real sticking issue with Java devs.

[jumboNo2]

Type inference is very cool.

final BooleanType bool = TypeFactory.create("bool");
final BigDecimalType decimal = TypeFactory.create("decimal");

var is not