Delphi 7 for Java Programmers – Jessica's Corner of Cyberspace

Comments

Comment Style	Java	Delphi
`// comment`	yes	yes
`/* comment */`	yes	no
`(* comment *)`	no	yes
`{ comment }`	no	yes

Delphi convention: (* code *) vs {Textual Comment}

Procedure vs Function
Method in Java = either “function” (if it has a return value) or “procedure” (if it has no return value) in Delphi

Overloading a procedure:
In the interface section of your unit, add “overload;” at the end of both overloaded versions of the procedure.

    procedure TranslateForm(form : TTntForm); overload;
    procedure TranslateForm(form : TForm); overload;

Exceptions

Java	Delphi
Try	Try
Catch	Except
Finally	Finally
Throw	Raise

In order to have both an Except and Finally block for the same line of code, you have to nest Try blocks, like this:

Try
  Try
    causeSomeRandomException();
  except
    on E:Exception do ErrorMsg(num,'Error:',E.Message,True);
  end;
finally
  doSomeCleanup();
end;

Other suggested reading:
http://techinorg.blogspot.com/2008/09/delphi-for-java-developers.html
Comments on some of the differences the author found less enjoyable

http://www.webbasedprogramming.com/Java-Developers-Reference/ch5.htm
It’s going the other way Delphi to Java, so it’ll point out areas of difference, but not the Delphi syntax.

http://www.marcocantu.com/papers/ooplang.htm
Compares C++, Java, and Object Pascal (Delphi)’s OOP Features.