Java

Functions

Runnable       ()    -> ()
Supplier       ()    -> x
Callable       ()    -> x throws ex
Consumer       x     -> ()
BiConsumer     x,y   -> ()
Function       x     -> y
Predicate      x     -> boolean
BiFunction     x,y   -> z
UnaryOperator  x1    -> x2
BinaryOperator x1,x2 -> x3

Class member ordering

Generally, organize the code in such a way, that the reader does not need to jump around while reading the code, but can follow it top to bottom to the level of detail necessary

https://stackoverflow.com/a/1760869/12393574

• Static Variables
• Static Methods
• Public Variables
• Protected Variables
• Private Variables
• Constructors
• Public Methods
• Protected Methods
• Private Methods

static before anything

variables before constructors before methods

public before protected before private

The idea is that you define the object (the data), before the behaviours (methods). Statics need to be separated because they aren't really part of the object, nor it's behaviour.