Difference between “strict private” and “protected” Access Modifiers in Delphi?

Question

but I learn programming and after structured programming with Pascal language, I\'m beginning to learn about OOP with Delphi.

So, I don\'t really understand the diff

Answer 1

One case is missing in the other answers: private and even strict private fields of other instances can be accessed from code within their class:

type
  TSO1516493= class
  strict private
    A: Integer;
  public
    procedure ChangeOther(Param: TSO1516493);
  end;

{ TSO1516493 }

procedure TSO1516493.ChangeOther(Param: TSO1516493);
begin
  Param.A := -1; // accessing a strict private variable in other instance !
end;

(This is the same behavior as in Java.)