while循环仅运行一次

Question

I am trying to loop list A and compare each element in list A to list B looking for a match I can't figure out why this while loop is only executing once?

for (WebElement webElement : inputs) 
{
    if (webElement.getAttribute("type").equalsIgnoreCase("text")) 
    {       
        String element = webElement.getAttribute("id").toString();
        System.out.println("Element: " + element);

        while(e.hasMoreElements())
        {   
            String param = (String) e.nextElement();
            System.out.println("Parameter: " + param);     

            System.out.println(element.matches(param));
            if(element.matches(param))
            {
                webElement.sendKeys(vars.get(param));
                //inputs.remove(element);
            }
        }
    }           
}       

Sorry here is the rest of the code, is referenced before the code above

Hashtable vars = new Hashtable();


        vars.put("USERNAME","slider");  
        vars.put("POSTCODE","LU1 3LU");
        vars.put("EMAIL","david.cunningham@lumesse.com");
        vars.put("DOB","02 Mar 1983");

       Enumeration<String> e = vars.keys();

Answer 1

My guess is that you've got something like:

Enumeration e = vector.elements();

outside the for loop. You need to put it inside the for loop, before the while loop. Otherwise you're iterating all the the way through it, but never going back to the start.

(I'd also advise you to use the Iterable / Iterator interfaces if you possibly can, and generic collections.)

Answer 2

Based on the code you've shown, the enumeration e has one element in it. You haven't shown where e is created, so nobody will be able to tell you much else.