In this post, we will see how to remove all white spaces from String in java.
There are multiple ways to remove spaces from String.
- Using ReplaceAll
- Using Iteration
Using ReplaceAll :
You can simply call ReplaceAll method to remove white spaces as shown below.
String result1 = str.replaceAll("\s", "");
Using iteration :
You can iterate over String using charAt and check if Character is whitespace or not.
Java Program to remove all white spaces from String
package org.arpit.java2blog;
public class StringRemoveSpacesAllMain {
public static void main(String[] args) {
String str = " Hello world from java2blog.com ";
System.out.println("------------------------------");
System.out.println("Using replaceAll");
System.out.println("------------------------------");
// Using replaceAll
String result1 = str.replaceAll("\s", "");
System.out.println(result1);
String result2 = "";
// Using iteration
System.out.println("n------------------------------");
System.out.println("Using Iteration");
System.out.println("------------------------------");
for (int i = 0; i < str.length(); i++) {
if (!Character.isWhitespace(str.charAt(i))) {
result2 += str.charAt(i);
}
}
System.out.println(result2);
}
}
When you run above program, you will get below output:
------------------------------ Using replaceAll ------------------------------ Helloworldfromjava2blog.com ------------------------------ Using Iteration ------------------------------ Helloworldfromjava2blog.com
