How to check broken links on a web page

import java.util.ArrayList;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;

public class WebPageLinks {
    WebDriver driver;
    String url;
  
    @Before
    public void atBefore() throws Exception{
      
        driver = new FirefoxDriver();
        url = "http://www.google.com";
        driver.manage().window().maximize();
    }
     
    @Test
    public void atTest() throws Exception{
      
        driver.get(url);
      
        driver.findElement(By.id("gbqfq")).sendKeys("JAVA");    //Write 'JAVA' keyword in search text box
      
        driver.findElement(By.id("gbqfb")).click();
        Thread.sleep(4000);

         List<String> Linkarray = new ArrayList<String>();
       
          List<WebElement> Linklist = driver.findElements(By.tagName("a"));    //Finding all element on the page with 'a' tag.
       
          for (WebElement link : Linklist) {
          
           String links = link.getText();
                
           if(links.isEmpty()){
               System.out.println("No Text.");    //Checking if any link doesn't have text
           }
          else{
                 Linkarray.add(links );
                System.out.println(links);
           }
         
          }
         System.out.println("=============================================");
        
          for(int i=0; i<Linkarray.size(); i++)
        
          {
             System.out.println("Element at " + i  + " is : "+ Linkarray.get(i));
          }
              
          for (String linkToTest : Linkarray){
              try{
                  driver.findElement(By.linkText(linkToTest)).click();    //Clicking on the link
              }
              catch(Exception e){
                
                  System.out.println("The link "  + linkToTest.substring(0) + " is not found in the page.");  //Print if any link not present on the page. Some links might be change in this case when navigate on the main page
              }
            
              Thread.sleep(15000L);
            
              if(driver.getTitle().contains("Problem")) {          //Checking if page title having 'Problem' word
                  
                          System.out.println("Fail");
                    }
                 
              else{
                     System.out.println("pass");
                   }
            
                    driver.navigate().back();        //Navigate on main page
                    Thread.sleep(5000L);
                   }
    }
  
}

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