Thanks for the reply and insight.
That does work at the command line (as did running it from a jar file). I
am seeking to have it work in the NetBeans Output window and I found that
if I edited the Run (and Run File) Actions in the project properties to use
"java" instead of "exec", it does work. It did generate a nbactions.xml
file that was not there before.
Should this be the default behavior when one generates Java with Maven |
Java Application? I am looking for configurations to use with students who
are learning the language and OO thinking and don't want to add any more
friction than necessary.
Are there any downsides of making this change?
Dave
On Sat, Aug 28, 2021 at 2:15 PM Vladimir Machat <macha...@gmail.com> wrote:
> Hi,
>
> i believe it's exec:exec maven target problem, because if you run the
> same code with exec:java it works perfectly, even without the flush()
>
> try 'mvn exec:java -Dexec.mainClass=dgreen.printbug.NewMain' from
> command line
>
> On 28/08/2021 18:54, David Green wrote:
> > In NetBeans 12.4 and verified to also behave this way on NetBeans
> > 12.5-beta2, System.out.print is buffered such that it does not show up in
> > the NetBeans Output window until a System.out.println (or probably things
> > like program end, and some buffer full scenario).
> >
> > Using JDK 15 and a Maven Project. I am using macOS but my students who
> hit
> > this problem are using Windows.
> >
> > Example code:
> >
> > package dgreen.printbug;
> >
> > import java.util.Scanner;
> >
> > /**
> > * Demo program showing that System.out.print's are not pushed to output
> > window until a
> > * System.out.println
> > */
> > public class NewMain {
> >
> > /** @param args the command line arguments */
> > public static void main(String[] args) {
> > Scanner sc = new Scanner(System.in);
> > System.out.print("Enter your name: ");
> > System.out.flush(); // should not be necessary but does not work
> either
> > String name = sc.nextLine();
> > System.out.println("Hi " + name);
> > }
> > }
> >
> > —-
> > Running it after Clean & Build (or before)
> >
> > --- exec-maven-plugin:3.0.0:exec (default-cli) @ printbug ---
> > dave
> > Enter your name: Hi dave
> > ------------------------------------------------------------------------
> > BUILD SUCCESS
> >
> > where "dave" was typed in without the benefit of seeing the prompt.
> >
> > This works fine when run from true command line either inside a NetBeans
> > Terminal Window or the real command line.
> >
> > In Jira as https://issues.apache.org/jira/browse/NETBEANS-5961
> >
> > Dave
> >
>
