java - Resizing screen size for selenium test -

i have following selenium java code.

import org.junit.*; import org.openqa.selenium.*; import org.openqa.selenium.firefox.firefoxdriver; import org.openqa.selenium.remote.desiredcapabilities; import org.openqa.selenium.remote.remotewebdriver;  import java.net.url;  import static org.junit.assert.assertequals; import static org.junit.assert.asserttrue; import static org.junit.assert.fail;  @beforeclass public static void setup() throws exception {     driver = new remotewebdriver(new url(system.getproperty("webdriverurl")), desiredcapabilities.firefox());     baseurl = system.getproperty("baseurl");     driver.get(baseurl + "/"); }  @test public void testscreensize(){     driver.manage().window().setsize(992, 768); } 

i still cant seem resize window screen. text 'window' seen error. idea why?

update:

i can run code. doesnt show error. because of dependency version number. current code in beforeclass. firefox browser opens doesnt resize size want. also, need resize width. height not important.

driver = new remotewebdriver(new url(system.getproperty("webdriverurl")), desiredcapabilities.firefox());     baseurl = system.getproperty("baseurl");     driver.get(baseurl + "/");     driver.manage().window().setsize(new dimension(992, 768)); 

this works absolutely fine me without issues on selenium-server 2.48.2 ff41.0.2

import org.junit.*; import org.openqa.selenium.*; import org.openqa.selenium.remote.desiredcapabilities; import org.openqa.selenium.remote.remotewebdriver;  import java.net.url; import java.util.concurrent.timeunit;  public class so35079080 {      static webdriver driver;     @beforeclass     public static void setup() throws exception {         driver = new remotewebdriver(new url("wdurl"), desiredcapabilities.firefox());         driver.get("https://www.google.co.in");         driver.manage().window().maximize();         driver.manage().timeouts().pageloadtimeout(10, timeunit.seconds);     }      @test     public void testscreensize(){         driver.manage().window().setsize(new dimension(992, 768));     }      @afterclass     public static void teardown() {         driver.quit();     } }