Can't Retrieve Employees IDs

If my xml file (shown below as sample) has different employees with id's - is there a way I can get just the id's on there own?

Java Code:

<Employees>
<Employee id="1">
<age>29</age>
<name>Pankaj</name>
<gender>Male</gender>
<role>Java Developer</role>
</Employee>
<Employee id="2">
<age>35</age>
<name>Lisa</name>
<gender>Female</gender>
<role>CEO</role>
</Employee>
</Employees> mh_sh_highlight_all('java');

This is the code Im using - I know at the minute it gets the id details of id 3 but realistically I just want the id's and nothing else

Java Code:

private static String getEmployeeById(Document doc, XPath xpath, int id) {
String env = null;
try {
XPathExpression pathExpression =
xpath.compile("/Employees/Employee[@id=3]"); // line gets everything to do with id 3 but doesn't display the id

[code]....

Can this be achieved using xpath? I've been stuck on it for ages and I can't seem to really find anything to do with it