Jira BAEL-4211 (#11193)

* Init

* Removing mvnw files

* Apply eclipse code format

* Refactoring

* Refactoring

* BAEL-4211 Add benchmarks

* Delete hexagonal directory

* Refactoring based on the feedback

* Refactoring based on feedback - package rename

* Directory rename

Co-authored-by: asia <joannakrzeklubowiecka@protonmail.com>

core-java-modules/core-java-arrays-operations-advanced/src/main/java/com/baeldung/copyarraymethodsperformance/BenchmarkRunner.java

@@ -0,0 +1,11 @@
+package com.baeldung.copyarraymethodsperformance;
+
+public class BenchmarkRunner {
+
+    public static void main(String[] args) throws Exception {
+
+        org.openjdk.jmh.Main.main(args);
+
+    }
+
+}

core-java-modules/core-java-arrays-operations-advanced/src/main/java/com/baeldung/copyarraymethodsperformance/ObjectsCopyBenchmark.java

@@ -0,0 +1,42 @@
+package com.baeldung.copyarraymethodsperformance;
+
+import org.openjdk.jmh.annotations.*;
+
+import java.util.Arrays;
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+
+@BenchmarkMode(Mode.AverageTime)
+@State(Scope.Thread)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@Warmup(iterations = 10)
+@Fork(1)
+@Measurement(iterations = 100)
+public class ObjectsCopyBenchmark {
+
+    @Param({ "10", "1000000" })
+    public int SIZE;
+    Integer[] src;
+
+    @Setup
+    public void setup() {
+        Random r = new Random();
+        src = new Integer[SIZE];
+
+        for (int i = 0; i < SIZE; i++) {
+            src[i] = r.nextInt();
+        }
+    }
+
+    @Benchmark
+    public Integer[] systemArrayCopyBenchmark() {
+        Integer[] target = new Integer[SIZE];
+        System.arraycopy(src, 0, target, 0, SIZE);
+        return target;
+    }
+
+    @Benchmark
+    public Integer[] arraysCopyOfBenchmark() {
+        return Arrays.copyOf(src, SIZE);
+    }
+}

core-java-modules/core-java-arrays-operations-advanced/src/main/java/com/baeldung/copyarraymethodsperformance/PrimitivesCopyBenchmark.java

@@ -0,0 +1,43 @@
+package com.baeldung.copyarraymethodsperformance;
+
+import org.openjdk.jmh.annotations.*;
+
+import java.util.Arrays;
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+
+@BenchmarkMode(Mode.AverageTime)
+@State(Scope.Thread)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@Warmup(iterations = 10)
+@Fork(1)
+@Measurement(iterations = 100)
+public class PrimitivesCopyBenchmark {
+
+    @Param({ "10", "1000000" })
+    public int SIZE;
+
+    int[] src;
+
+    @Setup
+    public void setup() {
+        Random r = new Random();
+        src = new int[SIZE];
+
+        for (int i = 0; i < SIZE; i++) {
+            src[i] = r.nextInt();
+        }
+    }
+
+    @Benchmark
+    public int[] systemArrayCopyBenchmark() {
+        int[] target = new int[SIZE];
+        System.arraycopy(src, 0, target, 0, SIZE);
+        return target;
+    }
+
+    @Benchmark
+    public int[] arraysCopyOfBenchmark() {
+        return Arrays.copyOf(src, SIZE);
+    }
+}