Is it fluent interface or what is it?

Question

So, I am a beginner level Java guy and I was following the java 2D game development tutorial on YouTube by CodeNMore. in the States video (https://www.youtube.com/watch?v=871zoXsYrbI&index=11&list=PLah6faXAgguMnTBs3JnEJY0shAc18XYQZ), he had this line of code:

if(State.getState() != null) 
    State.getState().render(g);

Firstly, why doesnt the if statement need to have curly brackets ({})? Secondly, is it fluent interface thats why you put State.getState().render(g);? or is it something else?

Answer 1

Firstly, why doesn't the if statement need to have curly brackets ({})?

No need for {} if there is only one statement after the "if" clause. Usually its better to use {} to avoid confusion, even though its not in your example.

Secondly, is it fluent interface that's why you put State.getState().render(g);? or is it something else?

I would not worry about the term 'fluent' because there is no real agreed definition. This is an example of method chaining where State.getState() returns a State object, and then the render(g) method is invoked on the returned state. (I looked at the video in case anyone is wondering).

This is what the State.getState().render(g) looks like in two steps and does the same thing.

State tempState = State.getState(); tempState.render(g);