Win a copy of Soft Skills: The software developer's life manual this week in the Jobs Discussion forum!
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic

Scanner and MatchResult

 
jan ter avest
Ranch Hand
Posts: 46
  • 0
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
The following code is from the WhizLabs simulator:
class ScannerTest {
public static void main( String[] args ) {
String input = "1 done 2 done all done";
Scanner s = new Scanner(input);
s.findInLine("(\\d+) done (\\d+) done (\\w+)

done");
MatchResult result = s.match();
for (int i=1; i<= result.groupCount(); i++)// line a
System.out.print(result.group(i)+ " " ); // line b
s.close();
}
}

the code runs and compiles and output 1 2 all.

Here's my question: if I replace line a and b with just:
System.out.print(result.group() + " ");

Why does the code throw a runtime IllegalStateException, no match result available??
 
Javier Sanchez Cerrillo
Ranch Hand
Posts: 152
  • 0
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Aghhhhhhhhhhhh. I have seen that Interface in Whizlabs too!!!. Does MatchResult come in the exam???
 
jan ter avest
Ranch Hand
Posts: 46
  • 0
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Not according to the KB book.

WhizLabs tends to squeeze in some off-topic/extra material in its questions, in my opinion.

Btw, know of any other recommendable simulators? Im only using the whizlabs one at the moment...
 
It is sorta covered in the JavaRanch Style Guide.
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic