junit - None of the browsers are able to be launched and getting java.lang.NullPointerException and process exit with -1 -

this hook class.

public class hooks {       public string browser;     public static webdriver driver;      //ie, chrome, opera working |||  firefox ~working     @before     public void beforeeach() throws ioexception {          browser = system.getenv("browser");         if (browser == null) {             browser = "ie";         }         system.out.println("browser selected " + browser);          if (browser.equalsignorecase("chrome")) {             desiredcapabilities cap = new desiredcapabilities();             cap.setjavascriptenabled(true);             cap.setcapability(capabilitytype.accept_ssl_certs, true);             system.setproperty("webdriver.chrome.driver", "c:/program files/seleniumdrivers/chromedriver.exe");             driver = new chromedriver(cap);          } else if (browser.equalsignorecase("ie")) {              file file = new file("c:/program files/seleniumdrivers/iedriverserver.exe");             system.setproperty("webdriver.ie.driver", file.getabsolutepath());             driver = new internetexplorerdriver();          } else if (browser.equalsignorecase("opera")) {             desiredcapabilities capabilities = desiredcapabilities.opera();             capabilities.setcapability(capabilitytype.accept_ssl_certs, true);             file file = new file("c:/program files/seleniumdrivers/operadriver.exe");             system.setproperty("webdriver.opera.driver", file.getabsolutepath());             driver = new operadriver(capabilities);          } else{             driver = new firefoxdriver();               }         driver.manage().timeouts().pageloadtimeout(120, timeunit.seconds);         driver.manage().timeouts().implicitlywait(60, timeunit.seconds);         driver.manage().window().maximize();         driver.manage().deleteallcookies();     }       @after     public void close() {           driver.quit();     }  }  

i using selenium junit cucumber. have implemented code ie, firefox, chrome, opera. unable launch browsers , getting java null pointer exception. , no other error information in console.

the below java class login steps. clue please?

public class loginsteps {      public webdriver driverlaunch;     public string landingurl = "https://www.periscopix.com";      public loginsteps() {         driverlaunch = hooks.driver;     }      @given("^i on company landing page$")     public void i_am_on_company_landing_page() throws throwable {         driverlaunch.navigate().to("https://www.google.com");         driverlaunch.close();     }      @given("^i wait time$")     public void i_wait_for_some_time() throws throwable {         thread.sleep(1000);      }      @when("^then page loads succesfully$")     public void then_the_page_loads_succesfully() throws throwable {         assertequals(driverlaunch.getcurrenturl(), landingurl);      }  } 

thanks in advance

extend ^hooks^ in ^loginsteps^ , use static driver instance of ^hooks^. remove ^driverlaunch^ variable.