Java Program to Remove All Whitespaces from a String
In this program, you’ll learn to remove all whitespaces in a given string using regular expressions in Java.
Example 1: Program to Remove All Whitespaces
public class Whitespaces{
public static void main(String[] args){
String sentence = "T his is b ett er.";
System.out.println("Original sentence: " + sentence);
sentence = sentence.replaceAll("\s", "");
System.out.println("After replacement: " + sentence);
}
}
Output
Original sentence: T his is b ett er. After replacement: Thisisbetter.
In the aboe program, we use String’s replaceAll()
method to remove and replace all whitespaces in the string sentence.
We’ve used regular expression \s
that finds all white space characters (tabs, spaces, new line character, etc.) in the string. Then, we replace it with ""
(empty string literal).
Example 2: Take string from users and remove the white space
import java.util.Scanner;
class Main{
public static void main(String[] args){
// create an object of Scanner
Scanner sc = new Scanner(System.in);
System.out.println("Enter the string");
// take the input
String input = sc.nextLine();
System.out.println("Original String: " + input);
// remove white spaces
input = input.replaceAll("\s", "");
System.out.println("Final String: " + input);
sc.close();
}
}
Output
Enter the string J av a- P rog ram m ing Original String: J av a- P rog ram m ing Final String: Java-Programming
Here, the replaceAll()
method replaces all the white spaces from the string.
Python Example for Beginners
Two Machine Learning Fields
There are two sides to machine learning:
- Practical Machine Learning:This is about querying databases, cleaning data, writing scripts to transform data and gluing algorithm and libraries together and writing custom code to squeeze reliable answers from data to satisfy difficult and ill defined questions. It’s the mess of reality.
- Theoretical Machine Learning: This is about math and abstraction and idealized scenarios and limits and beauty and informing what is possible. It is a whole lot neater and cleaner and removed from the mess of reality.
Data Science Resources: Data Science Recipes and Applied Machine Learning Recipes
Introduction to Applied Machine Learning & Data Science for Beginners, Business Analysts, Students, Researchers and Freelancers with Python & R Codes @ Western Australian Center for Applied Machine Learning & Data Science (WACAMLDS) !!!
Latest end-to-end Learn by Coding Recipes in Project-Based Learning:
Applied Statistics with R for Beginners and Business Professionals
Data Science and Machine Learning Projects in Python: Tabular Data Analytics
Data Science and Machine Learning Projects in R: Tabular Data Analytics
Python Machine Learning & Data Science Recipes: Learn by Coding
R Machine Learning & Data Science Recipes: Learn by Coding
Comparing Different Machine Learning Algorithms in Python for Classification (FREE)
Disclaimer: The information and code presented within this recipe/tutorial is only for educational and coaching purposes for beginners and developers. Anyone can practice and apply the recipe/tutorial presented here, but the reader is taking full responsibility for his/her actions. The author (content curator) of this recipe (code / program) has made every effort to ensure the accuracy of the information was correct at time of publication. The author (content curator) does not assume and hereby disclaims any liability to any party for any loss, damage, or disruption caused by errors or omissions, whether such errors or omissions result from accident, negligence, or any other cause. The information presented here could also be found in public knowledge domains.