The driver executable does not exist: Selenium Firefox

I've been struggling with this for the past few hours. I'm trying to install Selenium web driver and have been running into a bunch of errors which prevent me from running the test page. I'm pretty sure my most recent issue is with this code:

"public static void main(String[] args) throws InterruptedException{ System.setProperty("webdriver.gecko.driver","C:/Users/theone/Downloads/geckodriver 2.exe");"

Would really appreciate any feedback on second steps!

package automationFramework;

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

public class FirstTestCase {

public static void main(String[] args) throws InterruptedException{
    System.setProperty("webdriver.gecko.driver","C:/Users/theone/Downloads/geckodriver 2.exe");

    // Create a new instance of the Firefox driver
    WebDriver driver = new FirefoxDriver();

    //Launch the Online Store Website
    driver.get("http://ift.tt/1xgcG6b");

    // Print a Log In message to the screen
    System.out.println("Successfully opened the website www.Store.Demoqa.com");

    //Wait for 5 Sec
    Thread.sleep(5);

    // Close the driver
    driver.quit();
}

}