Delete all whitespaces from a String in Java

Java 8Object Oriented ProgrammingProgramming

To delete all whitespaces from a string, use the replaceAll() method and replace every whitespace with empty.

Let’s say the following is our string.

String str = "This is it!";

Now, let us replace the whitespaces that will eventually delete them.

String res = str.replaceAll("\s+","");


 Live Demo

public class Demo {
   public static void main(String []args) {
      String str = "This is it!";
      System.out.println("String: "+str);
      String res = str.replaceAll("\s+","");
      System.out.println("String after deleting whitespace: "+res);


String: This is it!
String after deleting whitespace: Thisisit!
Updated on 27-Jun-2020 06:01:21