Print in the console in Delphi Xe2 like in Java

Question

I am working on a Delphi project for the first time, I used to develop on Java.

Is there a way to print in delphi's console like in java.

System.out.println("Message");

which I used to test code and find bugs (primitively).

Your question can be intepreted in at least two different ways. RRUZ talks about console-mode applications, while I talk about the IDE's event log (in any type of application). What exactly do you mean by "Delphi's console"? — Andreas Rejbrand, Dec 17 '13 at 21:07
@AndreasRejbrand `System.out.println()` is the process console. `Writeln` in Delphi. `cout` in C++. `Console.WriteLine()` in C#. `print()` in Python. etc. etc. — David Heffernan, Dec 17 '13 at 21:10
@DavidHeffernan: Thanks for clarifying. I was just about to look the Java stuff up. — Andreas Rejbrand, Dec 17 '13 at 21:11
`System.out.println()` shows in most IDEs when run in debug mode. I think the OP may want `OutputDebugString` to view messages when the application is run inside of Delphi IDE. — Marcus Adams, Dec 17 '13 at 21:37
@Marcus: I also thought so, and wrote that as an answer half an hour ago. But most people believe the OP is after `Writeln`. But I'll undelete my answer so the OP can choose for himself. — Andreas Rejbrand, Dec 17 '13 at 21:38

score 9 · Accepted Answer · edited Dec 17 '13 at 21:09

9

You must use Writeln (only for console applications).

{$APPTYPE CONSOLE}
begin
  Writeln('Hello');
  Readln;
end.

edited Dec 17 '13 at 21:09

David Heffernan

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answered Dec 17 '13 at 21:03

RRUZ

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You can also call [AllocConsole](http://msdn.microsoft.com/en-us/library/windows/desktop/ms681944%28v=vs.85%29.aspx) in a VCL application to use Writeln. Don't know about Firemonkey but it should work aswell on at least Windows. – Stefan Glienke Dec 18 '13 at 06:44

score 6 · Answer 2 · answered Dec 17 '13 at 21:04

6

If you want to put a string in the IDE's event log, you can use the OutputDebugString function.

answered Dec 17 '13 at 21:04

Andreas Rejbrand

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score 3 · Answer 3 · answered Dec 18 '13 at 17:12

3

I usually use the following code for "debugging" my programs.

    showmessage('Hello World');

That's how i do it.. :)

answered Dec 18 '13 at 17:12

Charles Segundo

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that's not what the OP asked. – RBA Dec 18 '13 at 18:02

score 1 · Answer 4 · edited May 23 '17 at 10:33

1

If you want something similar to Java console, you can use CodeSite, which uses an independent viewer

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Another similar tool is TraceTool

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More logging libraries on this question - Which logging library is better?

edited May 23 '17 at 10:33

Community

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answered Dec 18 '13 at 08:10

RBA

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score 0 · Answer 5 · answered Dec 18 '13 at 08:23

0

For debugging messages there is also the GExperts console to which you can write using the SendXXX procedures in GX_DbugIntf. This unit is part of the GExperts source code which is available on SourceForge.

answered Dec 18 '13 at 08:23

dummzeuch

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Print in the console in Delphi Xe2 like in Java

5 Answers5