JAVA Class that gets values from XML file

We need a JAVA Class that gets the values of the variables contained in a XML file. The class should have the methods to get all the XML variables that this file has ( Example File Attached ) I would invoke the class sending the XML file as an FILE or INPUTSTEAM object as the parameter. The following its an example of how I am expecting to use the class, File archivoXML = new File(/home/openbravo/[login to view URL]); classNeeded timbrado = new classNeeded(archivoXML); String javaSelloCFD = [login to view URL](); ---- where: "classNeeded" is the class we are asking to be build. The class gets the a file as a parameter and depending on the method that its invoked gets the corresponding variable value. "timbrado" its a new instance of this class "getselloCFD" its the method of the class that gets the value of the XML tag "selloCFD" that its inside the file. "javaSelloCFD" its a variable that stores the the returned value from the method