How to get the Width and Height of Images or Elements

 public class ImageTests {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub:
        Selenium selenium = new DefaultSelenium("localhost",4444,"*firefox","http://www.google.com");
        selenium.start();
        selenium.open("");
        //Print the Width of the Image
        System.out.println("Width Of Image is : " + selenium.getElementWidth("logo"));
       
        //Print the Height of the Image
        System.out.println("Height Of Image is : " + selenium.getElementHeight("logo"));   
       
        selenium.close();
        selenium.stop();
       
    }

}