How to find the broken link in a web page or how to determine a link is working or not.

Note- Here in place of any website i have created my webpage with broken link which i passed as url in to("url") method.

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;
import java.util.concurrent.TimeUnit;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;

public class BrokenLink {
    public static void main(String[] args) throws InterruptedException, IOException {
       
        WebDriver driver = new FirefoxDriver();
        driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
        driver.navigate().to("file:///C:/Program%20Files%20%28x86%29/sank_java/selenium/WebDriver/Selenium_web.html");
        List<WebElement> elements = driver.findElements(By.tagName("a"));
        System.out.println(elements.size());
       
        for(WebElement linkElement: elements){
            String link = linkElement.getAttribute("href");
            System.out.println(link);
            if(link!=null){
                 if(!isLink(link)){
                     continue;
                 }
            }
            verifyLinkActive(link);
        }
        driver.quit();
    }
    public static boolean isLink(String link){
       
        return link.contains("http://") ;
    }
    public static void verifyLinkActive(String linkUrl) throws IOException{
        try {
            URL url = new URL(linkUrl);
            HttpURLConnection httpURLConnect = (HttpURLConnection)url.openConnection();
            httpURLConnect.setConnectTimeout(3000);
            httpURLConnect.connect();
            if(httpURLConnect.getResponseCode()==HttpURLConnection.HTTP_NOT_FOUND){
                System.out.println(linkUrl+"-"+httpURLConnect.getResponseMessage()+"-"+
            HttpURLConnection.HTTP_NOT_FOUND);
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
    }

   
}