Working with length and bounds
To avoid getting exceptions, we need to stay within the bounds of the array. Indexes always start at 0, and they end at the length of the array minus 1. If you try to access an element outside this range, you’ll get ArrayIndexOutOfBoundsException. The key to avoiding this is working with the length of the array.
Determining the length of an array
We can determine the length of an array using the length property. The length property returns the number of elements in the array. For example, to get the length of our ages array, we can use the following code:
int arrLength = ages.length;
The length of the array starts counting at 1. Therefore, the length of our ages array is 5. The maximum index is 4.
Dealing with the bounds of an array
If you try to access or modify an array element using an invalid index (an index that is less than 0 or greater than or equal to the array’s length), Java throws ArrayIndexOutOfBoundsException...
