convert php regex to java regex

Question

Can somebody help me with converting a php regex to java regex?

It would be great and I would be appreciate you if you can help me, because I'm not so strong in regex.

$str = preg_replace ( '{(.)\1+}', '$1', $str )
$str = preg_replace ( '{[ \'-_\(\)]}', '', $str )

How I understand preg_replace function in php is the same as replaceAll in java?.. So in java code it would be like this.

str = str.replaceAll("{(.)\1+}", "$1");
str = str.replaceAll("{[ \'-_\(\)]}", "");

But this code wont be work because how I know that regex in php is different by java.

Please, somebody help me! Thanks a lot))

update

final result is

str = str.replaceAll("(.)\\1+", "$1");
str = str.replaceAll("[ '-_()]", "");

Don't escape more than you need to. Your second pattern could just as well be [ '-_()] (although in PHP you'd still have to escape the ', of course). — Martin Ender
– Martin Ender, Commented Jun 26, 2013 at 18:42
If you're not using any non-core regex features, regexes are the same everywhere and the only thing to look out for is stuff like whether you need to double up (escape) backslashes or not, multi-line behaviour, etc — Patashu
– Patashu, Commented Jun 27, 2013 at 0:53

anubhava · Accepted Answer · 2013-06-26 18:39:30Z

2

For this PHP regex:

$str = preg_replace ( '{(.)\1+}', '$1', $str );
$str = preg_replace ( '{[ \'-_\(\)]}', '', $str )

In Java:

str = str.replaceAll("(.)\\1+", "$1");
str = str.replaceAll("[ '-_\\(\\)]", "");

I suggest you to provide your input and expected output then you will get better answers on how it can be done in PHP and/or Java.

answered Jun 26, 2013 at 18:39

anubhava

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1 Comment

Thanks!)) Yep! Surely I add the example of input string when I would be know it. At this time I don't know what is it)

Achrome · Accepted Answer · 2013-06-26 18:40:37Z

2

The only difference with Java regex is that you have to escape the backslashes.

str = str.replaceAll("(.)\\1+", "replacerString");
str = str.replaceAll("[ \\'-_\\(\\)]", "");

answered Jun 26, 2013 at 18:32

Achrome

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