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How to remove all white spaces from a String in Java?

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  • Difficulty Level : Easy
  • Last Updated : 07 Sep, 2022
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Given a String with white spaces, the task is to remove all white spaces from a string using Java built-in methods. 


Input: str = "       Geeks     for    Geeks   "            
Output: GeeksforGeeks

Input:  str = "    A  Computer  Science   Portal"
Output: AComputerSciencePortal

To remove all white spaces from String, use the replaceAll() method of String class with two arguments, i.e.

replaceAll("\\s", "");
where \\s is a single space in unicode



class BlankSpace {
    public static void main(String[] args)
        String str = "     Geeks     for Geeks     ";
        // Call the replaceAll() method
        str = str.replaceAll("\\s", "");


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