How to Perform Active Element Example Java Selenium With Example?

How to Perform Active Element Example Java Selenium With Example?

package com.selenium.mix;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
public class ActiveElement {
   public static void main(String[] args) throws InterruptedException 
   {
      // TODO Auto-generated method stub
      WebDriver obj=new FirefoxDriver();
      obj.get("http://www.google.com");
      obj.switchTo().activeElement().sendKeys("softwaretestingblog");
      obj.findElement(By.name("btnK")).click();
      Thread.sleep(3000);
      obj.close();
   }
}