«

Hi,

I was trying to use Java's regular expression to parse the following
string:

{"hello", "hello world", "1hello-2*hello"}

I'd like to extract the words inside the quotation marks as follows:

hello
hello world
1hello-2*hello

I've tried different ways to write the expression but didn't work this
out. Can anyone help?

Thanks a lot.
Roy

Roy wrote:

> I was trying to use Java's regular expression to parse the following
> string:

> hello
> hello world
> 1hello-2*hello

Why do you asking us to do your homework?

Goto: http://java.sun.com/j2se/1.5.0/docs/api/ , class Pattern
and remember about double backslash (\\).

--
Pozdrawiam,
J.W.

Jacek Wojciechowski wrote:
> Why do you asking us to do your homework?
>
Hey Roy, here's a free tip: It is very likely to get responses like this
when making requests of the form "Please solve my problem!" without
showing and explaining *what you* have tried already and what your exact
problem with your approach is.


regards,
/W

On Jan 6, 7:59 am, Wildemar Wildenburger
<lasses_w...@klapptsowieso.net> wrote:
> Jacek Wojciechowski wrote:
> > Why do you asking us to do your homework?
>
> Hey Roy, here's a free tip: It is very likely to get responses like this
> when making requests of the form "Please solve my problem!" without
> showing and explaining *what you* have tried already and what your exact
> problem with your approach is.
>
> regards,
> /W

Hi Jacek,
Thank you for the tip. Actually, this is not my homework. I just
started learning regular expression last night and came up with this
problem. I've tried many ways to parse this string but haven't
succeeded yet.

The problem that bugs me is the spaces inside the quotation marks and
the spaces outside of them. I don't know how to write an expression to
distinguish them. Of course I believe I can find other ways to parse
the string without using any regular expressions. But I am just
curious whether a simple expression can do the job.

Here are what I've tried:

Enter your regex: [^{},"]+
Enter input string to search: {"hello", "hello world",
"1hello-2*hello"}
I found the text "hello" starting at index 2 and ending at index 7.
I found the text " " starting at index 9 and ending at index 10.
I found the text "hello world" starting at index 11 and ending at
index 22.
I found the text " " starting at index 24 and ending at index
33.
I found the text "1hello-2*hello" starting at index 34 and ending at
index 48.
I found the text " " starting at index 50 and ending at index 51.

Enter your regex: [^{},"\s+]+
Enter input string to search: {"hello", "hello world",
"1hello-2*hello"}
I found the text "hello" starting at index 2 and ending at index 7.
I found the text "hello" starting at index 11 and ending at index 16.
I found the text "world" starting at index 17 and ending at index 22.
I found the text "1hello-2*hello" starting at index 34 and ending at
index 48.

Roy wrote:
> Hi,
>
> I was trying to use Java's regular expression to parse the following
> string:
>
> {"hello", "hello world", "1hello-2*hello"}
>
> I'd like to extract the words inside the quotation marks as follows:
>
> hello
> hello world
> 1hello-2*hello
>
> I've tried different ways to write the expression but didn't work this
> out. Can anyone help?
>
> Thanks a lot.
> Roy

The simplest regex:

"\\b\\w+\\b"

The "\\b" matches a word boundary (logical, so it actually doesn't match
a character), and the "\\w" matches a word character.

--
Beware of bugs in the above code; I have only proved it correct, not
tried it. -- Donald E. Knuth

On Sun, 6 Jan 2008 03:46:51 -0800 (PST), Roy <>
wrote, quoted or indirectly quoted someone who said :

>
>I've tried different ways to write the expression but didn't work this
>out. Can anyone help?

see http://mindprod.com/jgloss/regex.html

--
Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com

On Sun, 06 Jan 2008 19:01:25 GMT, Joshua Cranmer
<> wrote, quoted or indirectly quoted someone
who said :

>"hello", "hello world", "1hello-2*hello"

if you had a file that looked like that, you could read it as a csv
file. See http://mindprod.com/jgloss/csv.html
--
Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com