I am studying Generics in Java in Oracle docs. In Type Inference & Generic Methods section there is this code and it is not working in Intellij Idea. This is Box class This is BoxDemo class. Here is Screen Answer Try to change your for and iterate from boxes the type Box box instead of Box box
Tag: type-inference
How is compiler inferring type on a generic method?
I have a Storage class: There are two classes where class Child extends Parent: Parent Child Driver class: Because Storage is a generic class, the operations on its method makes sense; I get how case 1 is working. In case 2, with above signature of max in GenericTest, I get the compilation error: The method max(List<T>) in the type GenericTest
Why compiler cannot infer generic types of the inner class in Java?
When the above code snippet is compiled, it leads to Compile-Time error saying “incompatible types: cannot infer type arguments for A.InnerA<>. It seems to me that the Compiler should be able to infer the types to be InnerA<String>. Why is it not able to do so? It would be helpful if someone could explain how it works behind the scene.
Java generics impossible assignment?
Every time I think I understand generics better (and can answer without compiling), I get to an example where this theory breaks. Here is a very simple example: And two invocations: To me, none of the invocations should compile. A String is not a supertype of List. Still, the second one compiles. But let’s suppose that this happens because the
How can IntelliJ show type hints for automatically inferred local variables in Java 10?
IntelliJ shows type hints for local variables in Kotlin as shown here: This makes it easy to see the type of variables even if their types are inferred. Java 10 introduces type inference for Java with the var keyword. However, IntelliJ does not show any type hints by default: After searching the internet for a bit, I was unable to