https://jira.baeldung.com/browse/BAEL-9551 (#18970)

* https://jira.baeldung.com/browse/BAEL-9551

* https://jira.baeldung.com/browse/BAEL-9551

* https://jira.baeldung.com/browse/BAEL-9551

Author: Michaelin007

core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/arrayindexoutofbounds/ArrayIndexOutOfBoundsExceptionDemo.java

@@ -3,11 +3,16 @@
 import java.util.Arrays;
 import java.util.List;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 public class ArrayIndexOutOfBoundsExceptionDemo {
 
+    private static Logger LOG = LoggerFactory.getLogger(ArrayIndexOutOfBoundsExceptionDemo.class);
+
     public static void main(String[] args) {
         int[] numbers = new int[] { 1, 2, 3, 4, 5 };
-        
+
         getArrayElementAtIndex(numbers, 5);
         getListElementAtIndex(5);
         addArrayElementsUsingLoop(numbers);
@@ -20,6 +25,21 @@ public static void addArrayElementsUsingLoop(int[] numbers) {
         }
     }
 
+    public static int addArrayElementsUsingLoopInsideTryCatchBlock(int[] numbers) {
+        int sum = 0;
+
+        try {
+            for (int i = 0; i <= numbers.length; i++) {
+                sum += numbers[i];
+            }
+        } catch (ArrayIndexOutOfBoundsException e) {
+            LOG.info("Attempted to access an index outside array bounds: {}", e.getMessage());
+            return -1;
+        }
+
+        return sum;
+    }
+
     public static int getListElementAtIndex(int index) {
         List<Integer> numbersList = Arrays.asList(1, 2, 3, 4, 5);
         return numbersList.get(index);

core-java-modules/core-java-exceptions-4/src/test/java/com/baeldung/exception/arrayindexoutofbounds/ArrayIndexOutOfBoundsExceptionDemoUnitTest.java

@@ -1,5 +1,6 @@
 package com.baeldung.exception.arrayindexoutofbounds;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import org.junit.jupiter.api.BeforeAll;
@@ -16,19 +17,23 @@ public static void setUp() {
 
     @Test
     void givenAnArrayOfSizeFive_whenAccessedElementBeyondRange_thenShouldThrowArrayIndexOutOfBoundsException() {
-        assertThrows(ArrayIndexOutOfBoundsException.class,
-          () -> ArrayIndexOutOfBoundsExceptionDemo.addArrayElementsUsingLoop(numbers));
+        assertThrows(ArrayIndexOutOfBoundsException.class, () -> ArrayIndexOutOfBoundsExceptionDemo.addArrayElementsUsingLoop(numbers));
+    }
+
+    @Test
+    void givenAnArrayOfSizeFive_whenAccessedElementBeyondRangeWithTryCatchBlock_thenShouldThrowArrayIndexOutOfBoundsException() {
+        int result = ArrayIndexOutOfBoundsExceptionDemo.addArrayElementsUsingLoopInsideTryCatchBlock(numbers);
+        assertEquals(-1, result);
+
     }
 
     @Test
     void givenAnArrayOfSizeFive_whenAccessedAnElementAtIndexEqualToSize_thenShouldThrowArrayIndexOutOfBoundsException() {
-        assertThrows(ArrayIndexOutOfBoundsException.class,
-          () -> ArrayIndexOutOfBoundsExceptionDemo.getArrayElementAtIndex(numbers, 5));
+        assertThrows(ArrayIndexOutOfBoundsException.class, () -> ArrayIndexOutOfBoundsExceptionDemo.getArrayElementAtIndex(numbers, 5));
     }
 
     @Test
     void givenAListReturnedByArraysAsListMethod_whenAccessedAnElementAtIndexEqualToSize_thenShouldThrowArrayIndexOutOfBoundsException() {
-        assertThrows(ArrayIndexOutOfBoundsException.class,
-          () -> ArrayIndexOutOfBoundsExceptionDemo.getListElementAtIndex(5));
+        assertThrows(ArrayIndexOutOfBoundsException.class, () -> ArrayIndexOutOfBoundsExceptionDemo.getListElementAtIndex(5));
     }
 }