How to get the value from <input> tag using java in Selenium web driver when the Value attribute is generated dynamically

Question

The HTML I am trying to operate on:

<select id="GlobalDateTimeDropDown" class="combo"
    onchange="CalculateGlobalDateTime('Time',this.value)" name="GlobalDateTimeDropDown">
       <option value="+5.5" selected="selected"> … </option>
       <option value="+12"> … </option>
       <option value="+8"> … </option>
       <option value="+2"> … </option>
    </select>
    <input id="GlobalDateTimeText" class="combo" type="text" name="GlobalDateTimeText"       value="" style="width:215px;padding:2px;" readonly="readonly"></input>

Java Code:

WebElement values=driver.findElement(By.id("GlobalDateTimeText")).getAttribute("Value");
System.out.println(values);

Output: Blank

Answer 1

To select the input value you'll need to use an xpath selector as using by.id will find the select element as they share the same id - which is bad practice as they really should be unique. Anyway, try:

driver.findElement(By.xpath("//input[@id='GlobalDateTimeText']")).getAttribute(‌​"value");