Description Ralph Gerbig 2019-07-10 10:43:10 EDT

In the type hierarchy (F4) and quick type hierarchy (CTRL+T) method references are not shown. Lambdas are shown. The following code example demonstrates this behaviour.

public class TypeHierarchy {

	private interface MyInterface {
		void interfaceMethod(String str); // 1
	}
	
	public static void main(String[] args) {
		MyInterface interfaceLambda = str -> System.out.println(str); // 2
		MyInterface interfaceMethodReference = TypeHierarchy::interfaceMethodImplentation; // 3
	}
	
	private static void interfaceMethodImplentation(String str) {
		System.out.println(str);
	}
}

Calling the type hierarchy on MyInterface#interfaceMethod (1) does display the lambda only (2). The method reference is not shown (3).