Solved

Java matches regular expression

Posted on 2013-11-24
2
291 Views
Last Modified: 2013-11-24
Hi,
I have this regular expression which i would be using with matches..

String reg = "(?:\\s|\\A)[##]+([A-Za-z0-9-_]+)";

What does this mean? there is ? and etc...To me, it looks, like the string must start with s or A followed by the hash sign and then, it should words ...Is this right ?
0
Comment
Question by:zizi21
[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
2 Comments
 
LVL 18

Accepted Solution

by:
Matthew Kelly earned 500 total points
ID: 39672919
Here is a list of all the regular expression codes that you can use as future reference: http://www.cheatography.com/davechild/cheat-sheets/regular-expressions/

The expression would find a string that started with either "\A##" or "\s##" and then was followed by a string of letters, numbers or a dash or underscore.

So for example "\s##TestingRegEx" would match.

You can test it here, highlighted over each part even outlines what each one means:

http://gskinner.com/RegExr/
0
 

Author Closing Comment

by:zizi21
ID: 39673067
Thanks a lot.
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Suggested Solutions

INTRODUCTION Working with files is a moderately common task in Java.  For most projects hard coding the file names, using parameters in configuration files, or using command-line arguments is sufficient.   However, when your application has vi…
In this post we will learn how to make Android Gesture Tutorial and give different functionality whenever a user Touch or Scroll android screen.
Viewers learn about the “for” loop and how it works in Java. By comparing it to the while loop learned before, viewers can make the transition easily. You will learn about the formatting of the for loop as we write a program that prints even numbers…
This tutorial covers a practical example of lazy loading technique and early loading technique in a Singleton Design Pattern.

756 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