ArrayIndexOutOfBoundsException occurs when
Question
ArrayIndexOutOfBoundsException occurs when
Solution
ArrayIndexOutOfBoundsException occurs when you try to access an array element using an index that is outside the valid range. The valid range for array indices is from 0 to the length of the array minus 1. If you try to access an array element using a negative index or an index that is equal to or greater than the length of the array, an ArrayIndexOutOfBoundsException will be thrown.
Here are the steps that lead to this exception:
-
Declare and initialize an array. For example,
int[] array = new int[5];This creates an array of integers with a length of 5. -
Try to access an element of the array using an invalid index. For example,
int number = array[5];orint number = array[-1];In the first case, the index 5 is not valid because the valid indices for this array are 0 to 4. In the second case, the index -1 is not valid because indices must be non-negative. -
When the invalid index is used, the Java runtime system detects this and throws an ArrayIndexOutOfBoundsException.
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