public class sikuli {

    public static void main(String[] args) throws Exception {
        //Screen screen=new Screen();
        //screen.click("//home//exeter//Pictures//googlechrome.png");
        System.setProperty("webdriver.chrome.driver","//home//exeter//Documents//chromedriver");
        WebDriver driver=new ChromeDriver();
        driver.get("https://mail.google.com");

Starting ChromeDriver 2.24.417424 (c5c5ea873213ee72e3d0929b47482681555340c3) on port 11320
Only local connections are allowed.
Oct 19,2016 10:07:22 AM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Attempting bi-dialect session,assuming Postel’s Law holds true on the remote end
Oct 19,2016 10:08:22 AM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS
Exception in thread “main” org.openqa.selenium.NoSuchSessionException: no such session
(Driver info: chromedriver=2.24.417424 (c5c5ea873213ee72e3d0929b47482681555340c3),platform=Linux 4.4.0-43-generic x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 9 milliseconds
Build info: version: ‘unkNown’,revision: ‘350cf60’,time: ‘2016-10-13 10:43:56 -0700’
Driver info: org.openqa.selenium.chrome.ChromeDriver
Capabilities [{message=unkNown error: Chrome Failed to start: exited abnormally

selenium.waitForPagetoLoad("30000");

Selenium WebDriver中的等效java代码是什么？

>如果你需要等待60秒,你可以使用Thread.sleep(60000)
>如果您想确保页面已加载(可能小于或大于60秒),我建议使用以下方法：

确定目标网页中的元素&等待它可以点击.然后您确定该页面已加载.

webdriverwait wait = new webdriverwait(driver,120);
wait.until(ExpectedConditions.elementToBeClickable(By.id(id)));

WebDriver等待最多120秒.对于可点击的元素.如果元素在此之前可单击,则测试将进行.

List <WebElement> listofItems = wd.findElements(By.xpath("//*[starts-with(@id,'result_')]//div//div[1]//div//a//img"));

for (int i=1; i<=listofItems.size(); i++)
{
   listofItems.get(i).click();
   wd.manage().timeouts().implicitlyWait(30,TimeUnit.SECONDS);
   System.out.println(i);
   System.out.println("pass");
   wd.navigate().back();
}

List <WebElement> listofItems = wd.findElements(By.xpath("//*[starts-with(@id,'result_')]//div//div[1]//div//a//img"));
webdriverwait wait = new webdriverwait(wd,20); //Wait time of 20 seconds

for (int i=1; i<=listofItems.size(); i++)
{ 
    /*Getting the list of items again so that when the page is
     navigated back to,then the list of items will be refreshed
     again */ 
    listofItems = wd.findElements(By.xpath("//*[starts-with(@id,'result_')]//div//div[1]//div//a//img"));

    //Waiting for the element to be visible
    //Used (i-1) because the list's item start with 0th index,like in an array
    wait.until(ExpectedConditions.visibilityOf(listofItems.get(i-1)));

    //Clicking on the first element 
    listofItems.get(i-1).click();
    wd.manage().timeouts().implicitlyWait(30,TimeUnit.SECONDS);
    System.out.print(i + " element clicked\t--");
    System.out.println("pass");
    wd.navigate().back(); 
}

所以,上面我稍微调整了一下你的代码并获得相关的评论,其中包含了更改以及原因.希望这对你有用.