What is the java domain?

Domain in java

The so-called domain is actually the translation of "field", which is what we often call fields, or Attributes. Such as class fields (properties), local and global.

field, a field is an attribute, which can be a class variable, an object variable, an object method variable or a function parameter.

class bike{ static int bikes; int gear; int cadence; void create( int newGear, int newCadence ){ bikes = bikes + 1; gear = newGear; cadence = newCadence;} int getSpeed(){ int speed = gear*cadence*5*3.141; return speed; } }

bikes is a class variable (static domain).

gear and cadence are object variables (instance variables) (non-static fields).

(There is a little contradiction here. In fact, according to the encyclopedia, bikes, gear and cadence are all class variables. bikes is a static variable in the class variable, and gear and cadence are class variables. Instance variable.)

speed is a variable (local variable) of the object method.

(See, local variable, gobal variable, global variable does not appear in Java. If I want to say, the scope of class variables is the same as global variables, but they are not called that).

newGear and newCadence are parameters (parameters) of functions (methods).

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