Code for article BAEL-2386 (#5958)

* Add code for the article 'Java Primitives versus Objects'

* Use JMH for benchmarking the primitive and wrapper classes

* Uncomment the benchmarks and remove unused class

* Add a binary search tree implementation

* Add an example of how to use the binary tree class

* Adjust the print statements

* Add a code for article #BAEL-2386

core-java/src/main/java/com/baeldung/flightrecorder/FlightRecorder.java

@@ -0,0 +1,32 @@
+package com.baeldung.flightrecorder;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Simple program that illustrates how to use Java Flight Recorder.
+ * 
+ * This programs creates a list, inserts objects in it until 
+ * an OutOfMemoryError is thrown.   
+ *
+ */
+public class FlightRecorder {
+
+    public static void main(String[] args) {
+        List<Object> items = new ArrayList<>(1);
+        try {
+            while (true) {
+                items.add(new Object());
+            }
+        } catch (OutOfMemoryError e) {
+            System.out.println(e.getMessage());
+        }
+        assert items.size() > 0;
+        try {
+            Thread.sleep(1000);
+        } catch (InterruptedException e) {
+            System.out.println(e.getMessage());
+        }
+    }
+
+}