XPath waluty v2 z predykatem

ObslugaXML/src/main/java/przyklady_xpath/WalutyXPath2.java

@@ -32,16 +32,13 @@ public class WalutyXPath2 {
             System.out.println("Ewaluacja");
             double suma = 0;
             int ilosc = 0;
-            NodeList rates = (NodeList) xpath.evaluate("//Rate", doc, XPathConstants.NODESET);
+            NodeList rates = (NodeList) xpath.evaluate("//Rate[Code = '" + szukanyKod + "']", doc, XPathConstants.NODESET);
             final int nRates = rates.getLength();
             for (int i = 0; i < nRates; i++) {
                 Node rate = rates.item(i);
-                String code = xpath.evaluate("Code", rate);
-                if(code.equalsIgnoreCase(szukanyKod)) {
-                    suma += (Double)xpath.evaluate("Mid", rate, XPathConstants.NUMBER);
-                    ilosc++;
-                    System.out.println(ilosc);
-                }
+                suma += (Double)xpath.evaluate("Mid", rate, XPathConstants.NUMBER);
+                ilosc++;
+                System.out.println(ilosc);
             }
             double srednia = suma / ilosc;
             System.out.println("Średni kurs waluty " + szukanyKod + " = " + srednia);