add invoking static methods (#11439)

core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/access/staticmethods/GreetingAndBye.java

@@ -0,0 +1,12 @@
+package com.baeldung.reflection.access.staticmethods;
+
+public class GreetingAndBye {
+
+    public static String greeting(String name) {
+        return String.format("Hey %s, nice to meet you!", name);
+    }
+
+    private static String goodBye(String name) {
+        return String.format("Bye %s, see you next time.", name);
+    }
+}

core-java-modules/core-java-reflection-2/src/test/java/com/baeldung/reflection/check/abstractclass/GreetingAndByeClassUnitTest.java

@@ -0,0 +1,28 @@
+package com.baeldung.reflection.check.abstractclass;
+
+import com.baeldung.reflection.access.staticmethods.GreetingAndBye;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+class GreetingAndByeUnitTest {
+
+    @Test
+    void givenPublicStaticMethod_whenCallWithReflection_thenReturnExpectedResult() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
+        Class<GreetingAndBye> clazz = GreetingAndBye.class;
+        Method method = clazz.getMethod("greeting", String.class);
+        Object result = method.invoke(null, "Eric");
+        Assertions.assertEquals("Hey Eric, nice to meet you!", result);
+    }
+
+    @Test
+    void givenPrivateStaticMethod_whenCallWithReflection_thenReturnExpectedResult() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
+        Class<GreetingAndBye> clazz = GreetingAndBye.class;
+        Method method = clazz.getDeclaredMethod("goodBye", String.class);
+        method.setAccessible(true);
+        Object result = method.invoke(null, "Eric");
+        Assertions.assertEquals("Bye Eric, see you next time.", result);
+    }
+}