8005473: Warnings compiling jaxp

Clean up compiling warnings.

Reviewed-by: weijun, chegar, forax

jaxp/src/com/sun/org/apache/xalan/internal/xslt/EnvironmentCheck.java

@@ -1005,7 +1005,7 @@ public class EnvironmentCheck
     {
       Class clazz = ObjectFactory.findProviderClass(DOM_CLASS, true);
 
-      Method method = clazz.getMethod(DOM_LEVEL3_METHOD, null);
+      Method method = clazz.getMethod(DOM_LEVEL3_METHOD, (Class<?>[])null);
 
       // If we succeeded, we have loaded interfaces from a
       //  level 3 DOM somewhere

jaxp/src/javax/xml/transform/FactoryFinder.java

@@ -210,7 +210,7 @@ class FactoryFinder {
                 providerClass.getDeclaredMethod(
                     "newTransformerFactoryNoServiceLoader"
                 );
-                return creationMethod.invoke(null, null);
+                return creationMethod.invoke(null, (Object[])null);
             } catch (NoSuchMethodException exc) {
                 return null;
             } catch (Exception exc) {

jaxp/src/javax/xml/validation/SchemaFactoryFinder.java

@@ -357,7 +357,7 @@ class SchemaFactoryFinder  {
                 providerClass.getDeclaredMethod(
                     "newXMLSchemaFactoryNoServiceLoader"
                 );
-                return creationMethod.invoke(null, null);
+                return creationMethod.invoke(null, (Object[])null);
             } catch (NoSuchMethodException exc) {
                 return null;
             } catch (Exception exc) {

jaxp/src/javax/xml/xpath/XPathFactoryFinder.java

@@ -333,7 +333,7 @@ class XPathFactoryFinder  {
                 providerClass.getDeclaredMethod(
                     "newXPathFactoryNoServiceLoader"
                 );
-                return creationMethod.invoke(null, null);
+                return creationMethod.invoke(null, (Object[])null);
             } catch (NoSuchMethodException exc) {
                 return null;
             } catch (Exception exc) {