Launching Browsers Selenium &Webdriver

·         driver=new FirefoxDriver();//->Fifefoxbrowser
 System.setProperty("webdriver.chrome.driver","E:\\lib\\chromedriver.exe"); //--->chrome browser path
driver=new ChromeDriver();
 System.setProperty("webdriver.ie.driver","E:\\lib\\IEDriverServer.exe");  //--->IE for Windows path
driver=new InternetExplorerDriver();
 ​driver=new OperaDriver();   //--->Operabroser
 driver=new SafariDriver();   //--->Operabroser