How to Get Default Text Of a Text Box Using Java Selenium Program?

How to Get Default Text Of a TextBox Using Java Selenium Program?

package com.selenium.basics;
import java.util.concurrent.TimeUnit;
import org.apache.log4j.Logger;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
public class GetUsernameText 
{
   public static void main(String[] args)
   {
      Logger log=Logger.getLogger(GetUsernameText.class);
      WebDriver driver=new FirefoxDriver();
      driver.get("https://www.facebook.com/");
      log.info("Facebook Opened");
      driver.manage().timeouts().implicitlyWait(3000, TimeUnit.SECONDS);
      //driver.findElement(By.name("firstname")).sendKeys("abc@gmail.com");
      String st=driver.findElement(By.name("firstname")).getAttribute("aria-label");
      System.out.println(st);
   }
}