Java String Regex replacement

Question

Sample Input:

a:b
a.in:b
asds.sdsd:b
a:b___a.sds:bc___ab:bd

Sample Output:

a:replaced
a.in:replaced
asds.sdsd:replaced
a:replaced___a.sds:replaced___ab:replaced

String which comes after : should be replaced with custom function. I have done the same without Regex. I feel it can be replaced with regex as we are trying to extract string out of specific pattern.

For first three cases, it's simple enough to extract String after :, but I couldn't find a way to deal with third case, unless I split the string ___ and apply the approach for first type of pattern and again concatenate them.

Avinash Raj · Accepted Answer · 2015-07-17 07:24:17Z

4

Just replace only the letters with exists next to : with the string replaced.

string.replaceAll("(?<=:)[A-Za-z]+", "replaced");

DEMO

or

If you also want to deal with digits, then add \d inside the char class.

string.replaceAll("(?<=:)[A-Za-z\\d]+", "replaced");

edited Jul 17, 2015 at 7:24

answered Jul 17, 2015 at 6:58

Avinash Raj

175k32 gold badges247 silver badges289 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

RaceBase Over a year ago

just to update, :bc___ can be something like this :b566 or :4545. I guess we should consider numbers too

Avinash Raj Over a year ago

then add \\d inside the char class.

RaceBase Over a year ago

sorry for not clarifying. It can contain any data :[email protected] or :b@_g+.com .But guranteed not to contain : and ____ as these are self-defined pattern

RaceBase Over a year ago

could be dump question now, how do I call custom function instead of directly replacing with "replaced". My custom function should get the matching string matcher.group()

Avinash Raj Over a year ago

ask this as a new question. I think you need to include the replaceAll function within while function.

vks · Accepted Answer · 2015-07-17 06:59:07Z

4

(:)[a-zA-Z]+

You can simply do this with string.replaceAll.Replace by $1replaced.See demo.

https://regex101.com/r/fX3oF6/18

answered Jul 17, 2015 at 6:59

vks

68.1k11 gold badges96 silver badges132 bronze badges

Collectives™ on Stack Overflow

Java String Regex replacement

2 Answers 2

5 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

5 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related