How to Convert a Java String Against a Pattern Regex?

// Java Program to Convert 
// Java String against Pattern Regex
import java.util.regex.*;
// Driver Class
public class Temp {
    // Method to check pattern
    static void checkPattern(String testString, String regex) {
        // Split the string based on whitespaces
        String[] words = testString.split("\\s+");
        // Compile the pattern
        Pattern pattern = Pattern.compile(regex);
        for (String word : words) {
            Matcher matcher = pattern.matcher(word);
            // Check if the string matches the pattern
            if (!matcher.matches()) {
                System.out.print(word + " ");
            }
        }
        System.out.println();
    }
    // Main Function
    public static void main(String[] args) {
        String testString = "I am in GFG. GFG is a good company and I like to work in it";
        // Define a simple regex pattern
        // Regex for GFG
        String regex = ".*\\bGFG\\b.*";
        // Call the checkPattern method
        checkPattern(testString, regex);
    }
}