How to scroll to bottom/down of page in Selenium ?

@Test //(enabled=false)
public void ScrolltoBottomonPage() throws Exception
{
driver.get("http://seleniumsubbu.blogspot.in/");
Thread.sleep(5000);
((JavascriptExecutor) driver).executeScript("window.scrollBy(0,5000)");

// OR

JavascriptExecutor jse = (JavascriptExecutor)driver;
jse.executeScript("window.scrollBy(0,1000)", "");

// OR

jse.executeScript("scroll(0, 250)");

}

@Test //Page Scroll "DOWN" using Selenium WebDriver
public void ScrollDown() throws Exception

{
driver.get("http://seleniumsubbu.blogspot.in/");
JavascriptExecutor jse = (JavascriptExecutor)driver;
jse.executeScript("scroll(0, 950)"); // Y value is scroll down
Thread.sleep(5000);
}
@Test //Page Scroll "UP" using Selenium WebDriver
public void ScrollTop() throws Exception

{
driver.get("http://seleniumsubbu.blogspot.in/");
Thread.sleep(3000);
JavascriptExecutor jse = (JavascriptExecutor)driver;
jse.executeScript("scroll(750, 0)"); // X value is scroll up
}