Remove extra spaces from string in java

0 votes

I have a string like this:

mysz = "name=john age=13 year=2001";

I want to remove the whitespaces in the string. I tried trim() but this removes only whitespaces before and after the whole string. I also tried replaceAll("\\W", "") but then the = also gets removed.

How can I achieve a string with:

mysz2 = "name=johnage=13year=2001"
Apr 13, 2018 in Java by developer_1
• 3,310 points

4 answers to this question.

0 votes

st.replaceAll("\\s+","") and st.replaceAll("\\s","") produce the same result.

The second regex is 20% faster than the first one, but as the number consecutive spaces increases, the first one performs better than the second one.

Assign the value to a variable, if not use directly:

st = st.replaceAll("\\s+","")
answered Apr 13, 2018 by Rishabh
• 3,620 points
0 votes

\w = Anything that is a word character

\W = Anything that isn't a word character (including punctuation etc)

\s = Anything that is a space character (including space, tab characters etc)

\S = Anything that isn't a space character (including both letters and numbers, as well as punctuation etc)

answered Jul 30, 2018 by Daisy
• 8,110 points
0 votes

If you need to remove unbreakable spaces too, you can upgrade your code like this :

st.replaceAll("[\\s|\\u00A0]+", "");
answered Sep 3, 2018 by Sushmita
• 6,900 points
0 votes
import java.util.regex.Matcher;
import java.util.regex.Pattern;
String pattern="[\\s]";
String replace="";
part="name=john age=13 year=2001";
Pattern p=Pattern.compile(pattern);
Matcher m=p.matcher(part);
answered Sep 10, 2018 by Parth
• 4,630 points

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