forward() : void

package seleniumProject; 
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 NavigationCommandExample 
{ 
 public static void main(String[] args) 
 { 
// Create a driver object to launch the Firefox browser. 
   WebDriver driver = new FirefoxDriver(); 

// Declare a variable URL with data type String and stores the URL of the web page. 
   String URL = "http://www.google.com"; 
// Call navigate().to() command to navigate the URL of the web page. 
   driver.navigate().to(URL); // It takes parameter URL as a String and returns nothing. 
// Wait for Page to load completely. 
   driver.manage().timeouts().implicitlyWait(10,TimeUnit.SECONDS ); 

// Click on Gmail link text. 
// Call findElement method using WebDriver reference variable 'driver'. 
   WebElement element = driver.findElement(By.linkText("Gmail")); // The return type of findElement method is WebElement. 
   element.click(); 
   String titlePage1 = driver.getTitle(); 
   System.out.println("Title of web page: " +titlePage1); 

// Move to the previous web page. 
// Call navigate().back() command to move back by one page on the browser's history. 
   driver.navigate().back(); 
 try 
{ 
  Thread.sleep(1000); 
} 
catch (InterruptedException e) 
{ 
  e.printStackTrace(); 
 } 
String titleOfBackpage = driver.getTitle(); 
System.out.println("Title of back page: " +titleOfBackpage); 
int titleLengthBP = titleOfBackpage.length(); 
System.out.println("Length of title of back page: " +titleLengthBP); 

// Move to the next web page. 
// Call navigate().forward() command to move forward by one page on the browser's history. 
   driver.navigate().forward(); // It takes nothing as parameter and returns nothing. 
   String titleOfForwardpage = driver.getTitle(); 
   System.out.println("Title of forward page: " +titleOfForwardpage); 
   int titleLengthFP = titleOfForwardpage.length(); // Return type of the length() method is an integer. 
   System.out.println("Length of title of forward page: " +titleLengthFP); 

// Refresh the current webpage. 
// Call navigate().refresh() command to refresh the current page. 
   driver.navigate().refresh(); // accepts nothing as a parameter and returns nothing. 
   System.out.println("Refresh is successfully"); 
   String titleOfRefreshpage = driver.getTitle(); // line 1. 
   int titleLengthRP = titleOfRefreshpage.length(); // line 2. // Since return type of length() method is integer. Therefore, we will store it using a variable with data type integer. 

  System.out.println("Length of title of refresh page: " +titleLengthRP); // The above two lines (line 1 and line 2) of code can also be written in one step like this. 
// int titleLengthRP = driver.getTitle().length(); 

// Close the browser. 
   driver.close(); // It takes nothing as a parameter and returns nothing. 
  } 
}

Output: 
      Title of web page: Gmail - Free Storage and Email from Google 
      Title of back page: Google 
      Length of title of back page: 6 
      Title of forward page: Gmail - Free Storage and Email from Google 
      Length of title of forward page: 42 
      Refresh is successfully 
      Length of title of refresh page: 42