Web Reference: Jul 11, 2025 · In Java, to remove all white spaces from a String, there are several ways like using replaceAll() or manual iteration over characters. In this article, we will learn how to remove all white spaces from a string in Java. In this program, you'll learn to remove all whitespaces in a given string using regular expressions in Java. If you want to remove all spaces, tabs, and newlines in a string, use replaceAll() with a regular expression. Explanation: The regular expression \\s+ matches any whitespace character (spaces, tabs, newlines). Replacing them with an empty string removes all whitespace from the text.
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