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
• 3,280 points
54 views

4 answers to this question.

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
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
• 3,520 points
0 votes
replaceAll("\\s","")

\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
• 8,040 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
• 6,840 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);
part=m.replaceAll(replace);
System.out.println(part);
answered Sep 10, 2018 by parth295
• 4,600 points

Related Questions In Java

0 votes
1 answer

What do we understand from string pool in java?

This prints true (even though we don't use equals method: correct ...READ MORE

answered Apr 30, 2018 in Java by Daisy
• 8,040 points
26 views
0 votes
2 answers

Remove duplicate elements from an ArrayList in Java

List<String> al = new ArrayList<>(); // add elements ...READ MORE

answered Jul 26, 2018 in Java by Sushmita
• 6,840 points
42 views
0 votes
2 answers

How can we remove an element from an array in Java?

You can use ArrayUtils class remove method which ...READ MORE

answered May 24, 2018 in Java by UshaK
75 views
0 votes
1 answer

Remove objects from an array in Java?

We can use external libraries: org.apache.commons.lang.ArrayUtils.remove(java.lang.Object[] array, int ...READ MORE

answered Jun 26, 2018 in Java by scarlett
• 1,280 points
27 views
0 votes
1 answer

How can I convert a String variable to a primitive int in Java

You can convert a String to int by using a function: int ...READ MORE

answered Apr 12, 2018 in Java by sharth
• 3,310 points
55 views
0 votes
1 answer

How to divide a string in two parts

String s="yourstring"; boolean flag = true; for(int i=0;i<s.length();i++) { ...READ MORE

answered Apr 13, 2018 in Java by Rishabh
• 3,520 points
36 views
0 votes
1 answer

Formatting Double Value in Java

An alternative is to use String.format: double[] arr = ...READ MORE

answered May 15, 2018 in Java by Rishabh
• 3,520 points
34 views
0 votes
5 answers

How to compare Strings in Java?

String fooString1 = new String("foo"); String fooString2 = ...READ MORE

answered Jul 12, 2018 in Java by Daisy
• 8,040 points
87 views
0 votes
2 answers

Integer to String conversion in java

We can do this in 2 ways: String ...READ MORE

answered Jul 27, 2018 in Java by samarth295
• 2,190 points
55 views
0 votes
3 answers

String to Double conversion in java

Double temp = Double.valueOf(str); number = temp.doubleValue(); READ MORE

answered Sep 10, 2018 in Java by Sushmita
• 6,840 points
38 views

© 2018 Brain4ce Education Solutions Pvt. Ltd. All rights Reserved.
"PMP®","PMI®", "PMI-ACP®" and "PMBOK®" are registered marks of the Project Management Institute, Inc. MongoDB®, Mongo and the leaf logo are the registered trademarks of MongoDB, Inc.