java regex for a string

Question

I would like to generate a regex for a string like "S67-90". I used a syntax "String pattern = "\w\d\d\W\d\d"", but I would like to specify that the first word character should always start wit "S". Can anybody please help me with this?

My sample code is :

                      String pattern = "\\w\\d\\d\\W\\d\\d";
                      Pattern p = Pattern.compile((pattern));
                      Matcher m = p.matcher(result);
                      if (m.find()) {
                      System.out.println("Yes!It is!");
                       }
                     else{
                     System.out.println("No!Its not  :(");
                         }

Chuck Norris · Accepted Answer · 2012-04-02 09:38:22Z

5

Just replace first \\w with S in your pattern.

  String pattern = "S\\d\\d\\W\\d\\d";

answered Apr 2, 2012 at 9:38

Chuck Norris

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1 Comment

dmurali Over a year ago

Awww..! Thank you..! I already tried this one but was not sure if I was right.

npinti · Accepted Answer · 2012-04-02 09:42:21Z

3

If you want your match to start with the letter S, you can do as above. However, if you want to specify that the string must start with an S, you must do this: ^S\\d\\d\\W\\d\\d. This will instruct the regex engine to start matching from the beginning. This regex: S\\d\\d\\W\\d\\d will match bla bla S67-90. This regex: ^S\\d\\d\\W\\d\\d will match only strings starting with S, so it will match only S67-90.

answered Apr 2, 2012 at 9:42

npinti

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2 Comments

dmurali Over a year ago

Superrr..!! This works as well. I was looking for this exactly! Thanks!

npinti Over a year ago

@dmurali: You could also refactor your regex to something like this: ^S\\d{2}\\W\\d{2}. This should do the same work as the one you proposed, just less verbose. If this answer answered your query, then just mark it so :)

Fulgencio Jara · Accepted Answer · 2012-04-02 10:22:34Z

3

Easy, put an "S": String pattern = "[S]\\d\\d\\W\\d\\d";

edited Apr 2, 2012 at 10:22

answered Apr 2, 2012 at 9:39

Fulgencio Jara

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Comments

x2. · Accepted Answer · 2012-04-02 09:39:43Z

0

Simply change first \w to S

S\d\d\W\d\d

answered Apr 2, 2012 at 9:39

x2.

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