Merge pull request #10696 from amitiw4u/BAEL-4919-MaxSizeArray

Added changes to demonstrate max array size

core-java-modules/core-java-arrays-guides/src/main/java/com/baeldung/array/MaxSizeArray.java

@@ -0,0 +1,15 @@
+package com.baeldung.array;
+
+public class MaxSizeArray {
+
+    public static void main(String... strings) {
+        for (int i = 2; i >= 0; i--) {
+            try {
+                int[] arr = new int[Integer.MAX_VALUE - i];
+                System.out.println("Max-Size : "+ arr.length);
+            } catch (Throwable t) {
+                t.printStackTrace();
+            }
+        }
+    }
+}

core-java-modules/core-java-arrays-guides/src/test/java/com/baeldung/arrays/MaxArrySizeUnitTest.java

@@ -0,0 +1,30 @@
+package com.baeldung.arrays;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class MaxArrySizeUnitTest {
+
+    @Test
+    public void whenInitialArrayMoreThanMaxSize_thenThrowArray() {
+        boolean initalized = false;
+        try {
+            int[] arr = new int[Integer.MAX_VALUE - 1];
+            initalized = true;
+        } catch (Throwable e) {
+            Assert.assertTrue(e.getMessage().contains("Requested array size exceeds VM limit"));
+        }
+        Assert.assertFalse(initalized);
+    }
+
+    @Test
+    public void whenInitialArrayLessThanMaxSize_thenThrowArray() {
+        int[] arr = null;
+        try {
+            arr = new int[Integer.MAX_VALUE - 2];
+        } catch (Throwable e) {
+            Assert.assertTrue(e.getMessage().contains("Java heap space"));
+        }
+    }
+
+}