Added Javadoc Hint

jmh/src/main/java/com/baeldung/falsesharing/LongAdder.java

@@ -4,6 +4,8 @@ import java.io.Serializable;
 import java.util.concurrent.atomic.AtomicLong;
 
 /**
+ * Copy-pasted from {@link java.util.concurrent.atomic.LongAdder}
+ *
  * One or more variables that together maintain an initially zero
  * {@code long} sum.  When updates (method {@link #add}) are contended
  * across threads, the set of variables may grow dynamically to reduce

jmh/src/main/java/com/baeldung/falsesharing/Striped64.java

@@ -8,6 +8,8 @@ import java.util.function.DoubleBinaryOperator;
 import java.util.concurrent.ThreadLocalRandom;
 
 /**
+ * Copy-pasted from {@code java.util.concurrent.atomic.Striped64} class.
+ *
  * A package-local class holding common representation and mechanics
  * for classes supporting dynamic striping on 64bit values. The class
  * extends Number so that concrete subclasses must publicly do so.