How to start chrome browser using selenium webdriver?

For starting the chrome browser follow the instructions here - http://code.google.com/p/selenium/wiki/ChromeDriver

If you find it is difficult then dont worry just download the appropriate driver associated with your OS and then use the following code -

System.setProperty("webdriver.chrome.driver","path/to/chromedriver.exe");

It is the path to your downloaded chromedriver.exe

If you have a certificate warning for your product which uses https then use the following code -

       System.setProperty("webdriver.chrome.driver","path/to/chromedriver.exe");
        DesiredCapabilities dc = DesiredCapabilities.chrome();
        String[] options = { "--ignore-certificate-errors" };
        dc.setCapability("chrome.switches", Arrays.asList(options));
        return new ChromeDriver(dc);