Given a string with white spaces, the task is to remove all white spaces from a string using Java built-in methods.
Examples:
Input: str = " Geeks for Geeks " Output: neveropen
Input: str = " A Computer Science Portal" Output: AComputerSciencePortal
Method 1: Using string class in built functions
To remove all white spaces from String, use the replaceAll() method of the String class with two arguments, which is
replaceAll("\\s", "");
where \\s is a single space in unicode
Example:
Java
class BlankSpace { public static void main(String[] args) { String str = " Geeks for Geeks "; // Call the replaceAll() method str = str.replaceAll("\\s", ""); System.out.println(str); }} |
Output
neveropen
Method 2: Using Character Class in built functions
In this case, we are going to declare a new string and then simply add every character one by one ignoring the whiteSpace for that we will use Character.isWhitespace(char c).
Java
// Importing required librariesimport java.io.*;import java.util.*;// Classclass GFG { // Main driver method public static void main(String[] args) { String str = " Geeks for Geeks "; String op = ""; for (int i = 0; i < str.length(); i++) { char ch = str.charAt(i); // Checking whether is white space or not if (!Character.isWhitespace(ch)) { op += ch; } } System.out.println(op); }} |
Output
neveropen
Feeling lost in the world of random DSA topics, wasting time without progress? It’s time for a change! Join our DSA course, where we’ll guide you on an exciting journey to master DSA efficiently and on schedule.
Ready to dive in? Explore our Free Demo Content and join our DSA course, trusted by over 100,000 neveropen!
Ready to dive in? Explore our Free Demo Content and join our DSA course, trusted by over 100,000 neveropen!
