Example: Remove Leading/Trailing Spaces using replaceAll() in Java

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// Remove Leading/Trailing Spaces using replaceAll()
public class Main {
    public static void main(String[] args) {
        // Step 1: Define the input string with leading and trailing spaces
        String originalString = "   Hello Java World   ";
        System.out.println("Original String: '" + originalString + "'");

        // Step 2: Use replaceAll() with a regular expression to target leading/trailing spaces
        // Regex explanation:
        // ^\\s+ : Matches one or more whitespace characters at the beginning of the string.
        // |     : OR
        // \\s+$ : Matches one or more whitespace characters at the end of the string.
        String regex = "^\\s+|\\s+$";
        String replacedString = originalString.replaceAll(regex, "");

        // Step 3: Print the result
        System.out.println("Replaced String: '" + replacedString + "'");
    }
}