Get Last Word In A String

LastWord.java

public class LastWordExtractor {
    public static String getLastWord(String input) {
        // Trim the input string to remove leading and trailing whitespaces
        input = input.trim();

        // Find the index of the last space character
        int lastIndex = input.lastIndexOf(' ');

        // Check if a space was found
        if (lastIndex != -1) {
            // Use substring to extract the last word
            return input.substring(lastIndex + 1);
        } else {
            // If there are no spaces, the entire string is the last word
            return input;
        }
    }

    public static void main(String[] args) {
        String input1 = "Hello World";
        String input2 = "   This is a test   ";
        String input3 = "Java";
        
        System.out.println("Last word of '" + input1 + "': " + getLastWord(input1));
        System.out.println("Last word of '" + input2 + "': " + getLastWord(input2));
        System.out.println("Last word of '" + input3 + "': " + getLastWord(input3));
    }
}