Solved

Java: Regular expression, how to?

Posted on 2012-04-02
5
270 Views
Last Modified: 2012-04-03
Hello Experts,

can a regular expression locate two patterns in the same line? see code below

public class RegularExpression {

	public static void main(String[] args) {
		// log source
		String source = "12:22:22.826 message QueueRoute to 5554443322 \n"  +
				"12:22:22.926 message AddRoute to queue 65 \n" +
				"12:22:23.126 message CancelRoute to queue 45 \n" +
				"";		

		Pattern timePattern = Pattern.compile("\\d{2}:\\d{2}:\\d{2}\\.\\d{3} && (Queue\\w+)"); //this also works		
		Matcher timeMatcher = timePattern.matcher(source);
		while (timeMatcher.find()) {
			System.out.println(timeMatcher.group());
		}

	}// END OF MAIN

}// END OF CLASS

Open in new window


in other words, if time and word found, do something...
0
Comment
Question by:epifanio67
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
5 Comments
 
LVL 11

Expert Comment

by:techhealth
ID: 37798799
Why not just define two Patterns and check if both (or either) of them match?
0
 
LVL 36

Assisted Solution

by:mccarl
mccarl earned 250 total points
ID: 37798801
public class RegularExpression {

	public static void main(String[] args) {
		// log source
		String source = "12:22:22.826 message QueueRoute to 5554443322 \n"  +
				"12:22:22.926 message AddRoute to queue 65 \n" +
				"12:22:23.126 message CancelRoute to queue 45 \n" +
				"";		

		Pattern timePattern = Pattern.compile("(\\d{2}:\\d{2}:\\d{2}\\.\\d{3}).*(Queue\\w+)"); //this also works		
		Matcher timeMatcher = timePattern.matcher(source);
		while (timeMatcher.matches()) {
			System.out.println("Time: " + timeMatcher.group(1));
			System.out.println("Word: " + timeMatcher.group(2));
		}

	}// END OF MAIN

}// END OF CLASS

Open in new window


It has to find a timestamp followed by any number of characters and then the word Queue with at least one 'word' character after it. And then it prints the time stamp and the Queue word.
0
 
LVL 41

Accepted Solution

by:
HonorGod earned 250 total points
ID: 37798803
Sure, have them separated by .* (i.e., zero or more characters)


something like:

Pattern timePattern = Pattern.compile("\\d{2}:\\d{2}:\\d{2}\\.\\d{3}.*(Queue\\w+)");
0
 

Author Closing Comment

by:epifanio67
ID: 37798811
thank you experts...
I really appreciate all of your help...

regards,
0
 
LVL 41

Expert Comment

by:HonorGod
ID: 37800273
Thanks for the grade & points

Good luck & have a great day.
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
Introduction This article is the last of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers our test design approach and then goes through a simple test case example, how …
Video by: Michael
Viewers learn about how to reduce the potential repetitiveness of coding in main by developing methods to perform specific tasks for their program. Additionally, objects are introduced for the purpose of learning how to call methods in Java. Define …
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…

691 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question