IndexOutOfBoundsException in Java

The IndexOutOfBoundsException in Java is thrown when trying to access an index of a list, array, or other indexed data structure that is outside of its valid range.

This could occur when attempting to access an index that is negative or exceeds the length of the array or list.

For example, accessing an array at index 10 when the array only has 5 elements will trigger an IndexOutOfBoundsException.

To prevent this error, always ensure that any index used to access elements in a collection is within the valid range.

A good approach is to check the size of the list or array before trying to access a specific index using conditions like if (index >= 0 && index < array.length).

Another useful debugging technique is using enhanced for loops or iterating through collections with for-each to avoid directly working with indices.

Tools like Java debuggers or IDE warnings can help identify potential out-of-bounds errors during development, allowing for early prevention.

Always validate the size of arrays or lists before performing any operations that depend on specific indices to ensure your code runs smoothly.