#3701 - fix MissingStaticMethodInNonInstantiatableClass for method local classes

pmd-java/src/main/resources/category/java/errorprone.xml

@@ -2547,7 +2547,7 @@ See the property `annotations`.
             <property name="xpath">
                 <value>
 <![CDATA[
-//ClassOrInterfaceDeclaration[@Nested= false()]
+//ClassOrInterfaceDeclaration[@Nested= false() and @Local= false()]
 [
   (
     (: at least one constructor :)

pmd-java/src/test/resources/net/sourceforge/pmd/lang/java/rule/errorprone/xml/MissingStaticMethodInNonInstantiatableClass.xml

@@ -346,6 +346,36 @@ public abstract class MyADT {
             return onInt.apply(integer);
         }
     }
+}
+        ]]></code>
+    </test-code>
+
+    <test-code>
+        <description>#3701 - false positive with method inner class</description>
+        <expected-problems>0</expected-problems>
+        <code><![CDATA[
+public class Scratch {
+
+    public static void main(String[] args) {
+        Scratch scratch = new Scratch();
+
+        scratch.callMethod();
+    }
+
+    void callMethod() {
+
+        class InnerClass {
+            private InnerClass() {
+            }
+
+            void display() {
+                System.out.println("Works OK!");
+            }
+        }
+
+        InnerClass innerClass = new InnerClass();
+        innerClass.display();
+    }
 }
         ]]></code>
     </test-code>