Selenium WebDriver, work without an internet browser.

I have a simple selenium class. it works really well. Now I'm wondering how to do the same in console mode. In other words. I want the result (in code if the request was successful or not). I don't need to show in a web browser. if all is well, I need to return a value, if not another return value (something like true or false);

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

 WebDriver driver;
 WebElement loginInput;
 WebElement passwordInput;
 WebElement loginSubmit;
 driver = new FirefoxDriver();     

 driver.get("URL");
 loginInput = driver.findElement(By.id("id"));

 loginInput.sendKeys("ninotyesh");
 passwordInput =driver.findElement(By.id("id"));
 passwordInput.sendKeys("key");
 loginSubmit = driver.findElement(By.id("id"));
 loginSubmit.click();