单击使用硒java找到的webelement

Question

how can i get the webelement to be click based on data-key in the class _3d5d ? to be more exact, if a user input the value 2002, it will have an error that tells the user "no such year, please enter again" and allow him to reenter the value. if the value keyed in matches the data-type, it will click the element.

html snippet from firebug

<div class="_5ay5">
    <div class="_18fs">
    <div id="PageScrubberPagelet_153681831442414"          
     data-referrer="PageScrubberPagelet_153681831442414">
         <div class="_4vm5 _5ay5">
            <ul id="u_0_62">
                 <li class="_3d5d">
                     <a id="u_0_5x" class="_3d5b" role="button" href="#" 
                     data-key="recent">Recent</a>
                 </li>
                 <li class="_3d5d">
                     <a id="u_0_5y" class="_3d5b _-fk" role="button" 
                     href="#" data-key="year_2015">2015</a>
                 </li>
                 <li class="_3d5d">
                     <a id="u_0_5z" class="_3d5b" role="button" href="#" 
                     data-key="year_2014">2014</a>
                 </li>
                 <li class="_3d5d">
                     <a id="u_0_60" class="_3d5b" role="button" href="#" 
                     data-key="year_2013">2013</a>
                  </li>

This is what i have attempted and it clicks on whatever year the user has input. However, this solution is sort of hard-coded where the year to be searched in coded. So, is there a way that will allow the year to be retrieved if its available in the html? Also, allow the user to re-input if there is no such year.

    Scanner reader = new Scanner(System.in);  // Reading from System.in
    System.out.println("Enter a year (YYYY): ");
    String year = reader.next(); // Scans the next token of the input as an int.


        if (year.contains("recent")){
            WebElement recent = dr.findElement(By.xpath("//a[contains(@data-key,'recent')]"));                        
            recent.click(); 
        }    
        else if (year.contains("2015")){
            WebElement year_2015 = dr.findElement(By.xpath("//a[contains(@data-key,'2015')]"));                           
            year_2015.click();
        }
        else if (year.contains("2014")){
            WebElement year_2014 = dr.findElement(By.xpath("//a[contains(@data-key,'2014')]"));                           
            year_2014.click();
        }             
        else if (year.contains("2013")){
            WebElement year_2013 = dr.findElement(By.xpath("//a[contains(@data-key,'2013')]"));                        
            year_2013.click(); 
        }

Answer 1

Try this:

import org.openqa.selenium.NoSuchElementException;

Scanner reader = new Scanner(System.in);  // Reading from System.in
System.out.println("Enter a year (YYYY): ");
String year = reader.nextInt();

try {
    WebElement yearButton = dr.findElement(By.xpath("//a[contains(@data-key,'" + year + "')]"));                        
    yearButton.click(); 
} catch(NoSuchElementException e) {
    System.out.println("Element does not exist!");
}