I have imported the below packages but its throwing an error when using sendKeys();
import org.openqa.selenium.*;
import org.openqa.selenium.firefox.*;
import org.testng.Assert;
import org.openqa.selenium.WebDriver;
The code is as below.
import org.openqa.selenium.*;
import org.openqa.selenium.firefox.*;
import org.testng.Assert;
import org.openqa.selenium.WebDriver;
public class DemoCode {
    public static void main(String[] args)
      {
        WebDriver driver = new FirefoxDriver();
        String baseUrl = "http://www.facebook.com";
        String tagName="";
        driver.get(baseUrl);
        tagName = driver.findElement(By.id("email")).getTagName();
        System.out.println("TagName: "+tagName);   
        WebElement myElement = driver.findElement(By.id("username"));
        myElement.sendKeys("text");
      }
}
But I m receiving an error given below
The type java.lang.CharSequence cannot be resolved.
Can anyonehelp me in this.