Constructor method reference for (non-static) inner class?

Question

Is there something equivalent for StaticClass::new for inner class given the outer class instance?

Edit:

I.e. if I have

class Outer {
    class Inner {
    }
}

I can do Outer o = new Outer(); Inner i = o.new Inner() in old Java. How can I express the o.new Inner() as function reference.

Answer 1

According to the Oracle tutorials, there are four kinds of method references:

• Reference to a static method
  • ContainingClass::staticMethodName
• Reference to an instance method of a particular object
  • containingObject::instanceMethodName
• Reference to an instance method of an arbitrary object of a particular type
  • ContainingType::methodName
• Reference to a constructor
  • ClassName::new

References to a local/nested class are not listed, so I would assume it's not supported.

You can use the java.util.function.Supplier to trigger the usage of lambdas in order to obtain an instance of the nested class:

Outer outer = new Outer();
Supplier<Outer.Inner> supplier = () -> outer.new Inner();