Extracting specific pattern of string using regular expression

Question

I have a text while which shows certain output in the form of strings and numbers and from that I have a specific piece of text as follows .I want to extract a certain piece of text from that

This is a small piece of my content

gjhsgdjhgfjhdgfjkhsdgfjkhgsdfk7868736876534
Pattern is:
(4,24,[5,96]) -> (1,14,[14,15]), that is: "Poland" -> "Poland"
(4,46,[36,39]) -> (1,14,[14,15]), that is: "Kim" -> "Kim"

fhafsdhjdfgjhdagfkhj66876493985694(hjiikfghkjfhg,98698)
(hhgjhgdfj,jhgkjdhgf)

From this I want to get the output as

"Poland" -> "Poland"
"Kim" -> "Kim"
"The police" -> "The city police on Friday"

The code I tried is

Pattern p = Pattern.compile("(Pattern is:)\\((.*?)\\)");
  Matcher m = p.matcher(str);

  while(m.find())
  {
      System.out.println("fhkjsdfhkjsdh");
      System.out.println(m.group(2));

  }

@user3580294 "Pattern is:" is the piece of text I want to extract..My text file contains the word"Pattern is" and I want to extract the content after that — chopss
– chopss, Commented May 18, 2014 at 5:37

zx81 · Accepted Answer · 2014-05-18 06:37:30Z

1

You can use this:

Pattern p = Pattern.compile("\"[^\"]+\"\\s*->\\s*\"[^\"]+\"");

Use the overall match.

See demo

The expression just checks for strings of the form "Poland" -> "Poland" without bothering to check that Pattern is is matched anywhere, because (i) in the input that does not seem needed, and (ii) it is unclear what would constitute an ending delimiter of a Pattern section.

Let us know if this does what you want.

answered May 18, 2014 at 6:37

zx81

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3 Comments

zx81 Over a year ago

Glad it works chopu, thanks for letting me know. By the way this is not hwnd, though I'm sure he would have produced a great answer. :)

chopss Over a year ago

oh sry zx81 ..my mistake

zx81 Over a year ago

@chopu no worries, it's a compliment. :)

Farvardin · Accepted Answer · 2014-05-18 05:37:31Z

0

try this :

String newStr = str.replaceAll("^.*:", "");
System.out.println(newStr);

answered May 18, 2014 at 5:37

Farvardin

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1 Comment

chopss Over a year ago

thank you for answering and giving attention to my question. But it's not the output I needed

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