What is ArrayIndexOutOfBoundsException in Java and How to Fix It

ArrayIndexOutOfBoundsException in Java is a runtime exception. It occurs when the code tries to access an array element at the index that is outside the array's bounds. In simple words, the ArrayIndexOutOfBoundsException in Java is thrown when our code tries to access an array element at an index that is either less than 0 or greater than or equal to the size of the array. The array index in Java starts at 0 and ends at the array's length - 1 index.

The ArrayIndexOutOfBoundsException exception can occur in various cases, for example, when the code tries to access an array element at an index that is not within the boundaries of the array, when the code tries to use the length property of an array to access an element, or when a program incorrectly tries to use the for-each loop to iterate over an array.

In order to avoid the ArrayIndexOfBoundsException we should always check if the element we are trying to access at a specific index is valid or not. It should be greater than or equal to 0 and less than the array's length - 1.

To summarize, this exception is a runtime exception that is thrown by the JVM when we try to access the element that is outside the boundaries of the given array. To fix this exception or avoid it altogether, we should always check if the index is valid or not for the given array.