BAEL-870 How to call a method during runtime using reflection? (#1769)

* BAEL 870 How to call method during runtime using reflection?

* BAEL-870 How to call a method during runtime using reflection?

core-java/src/main/java/com/baeldung/java/reflection/Operations.java

@@ -0,0 +1,17 @@
+package com.baeldung.java.reflection;
+
+public class Operations {
+    
+    public double sum(int a, double b) {
+        return a + b;
+    }
+    
+    public static double multiply(float a, long b){
+        return a * b;
+    }
+
+    private boolean and(boolean a, boolean b) {
+        return a && b;
+    }
+    
+}