Java regex replace

Question

I've a csv string like

"abc, java, stackoverflow  ,     stack exchange   , test"

Can I use regex to remove the space around the commas to get a string like

"abc,java,stackoverflow,stack exchange,test"

Unfortunately "b , b" will be treated as two different values, but i'm fine with that :) — Rnet
– Rnet, Commented Jun 8, 2011 at 12:46

C. K. Young · Accepted Answer · 2011-06-08 12:41:59Z

29

str = str.replaceAll("\\s*,\\s*", ",");

answered Jun 8, 2011 at 12:41

C. K. Young

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5 Comments

C. K. Young Over a year ago

@Rnet: \s (which has to be written as \\s in a Java string literal) matches one whitespace character. * matches zero or more of the "thing" before it. So, \s* means zero or more whitespace characters. You can figure out the rest. ;-)

Rnet Over a year ago

@Chris Jester-Young: Thank you:)

asgs Over a year ago

+1 Damn. I was thinking why replace() is not working. Now I see from the docs, that replaceAll() supports regex. Thanks!

Rnet Over a year ago

@asgs: if you had used replace() to replace the white space, it would have replaced the space between the values also.

asgs Over a year ago

@Rnet actually, i was using the same regex inside the replace().

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