I want to know if a constructor in Java returns something. I know there is no return value like '5' or "Hello World." But if we are assigning a variable to it:
People person = new People();
In Java you only have primitives and references to objects as types for fields, parameters and local variables. A reference is a bit like an ID, except it can change as any moment without you needing to know when this has happened.
A reference is closer to the concept of a pointer or object index. ie. it refers to a memory location.
new is definitely a keyword in Java, so saying it doesn't exist isn't very meaningful. You could say it doesn't have a one to one mapping in byte code, except byte code is itself run on a virtual machine and the machine actually run could be rather different anyway. i.e. there isn't much point treating byte code as the way things "really" happen.